diff --git a/packages/api-client/src/schema.ts b/packages/api-client/src/schema.ts
index bae7d97..626e287 100644
--- a/packages/api-client/src/schema.ts
+++ b/packages/api-client/src/schema.ts
@@ -235,6 +235,7 @@ export interface operations {
                     prHeadCommit?: string | null;
                     referenceCommit?: string | null;
                     referenceBranch?: string | null;
+                    parentCommits?: components["schemas"]["Sha1Hash"][] | null;
                     /** @enum {string|null} */
                     mode?: "ci" | "monitoring" | null;
                     ciProvider?: string | null;
diff --git a/packages/core/src/ci-environment/git.ts b/packages/core/src/ci-environment/git.ts
index 07c2955..ebaea48 100644
--- a/packages/core/src/ci-environment/git.ts
+++ b/packages/core/src/ci-environment/git.ts
@@ -69,7 +69,7 @@ export function getMergeBaseCommitSha(input: {
   base: string;
   head: string;
 }): string | null {
-  let depth = 50;
+  let depth = 200;
   while (depth < 1000) {
     const mergeBase = getMergeBaseCommitShaWithDepth({
       depth,
@@ -78,7 +78,18 @@ export function getMergeBaseCommitSha(input: {
     if (mergeBase) {
       return mergeBase;
     }
-    depth += 50;
+    depth += 200;
   }
   return null;
 }
+
+export function listParentCommits(input: { sha: string }): string[] | null {
+  try {
+    execSync(`git fetch --depth 200 origin ${input.sha}`);
+    const raw = execSync(`git log --format "%H" -n 200 ${input.sha}`);
+    const shas = raw.toString().trim().split("\n");
+    return shas;
+  } catch {
+    return null;
+  }
+}
diff --git a/packages/core/src/ci-environment/index.ts b/packages/core/src/ci-environment/index.ts
index 23ffaa5..d3b9d24 100644
--- a/packages/core/src/ci-environment/index.ts
+++ b/packages/core/src/ci-environment/index.ts
@@ -53,6 +53,17 @@ export function getMergeBaseCommitSha(input: {
   return service.getMergeBaseCommitSha(input, context);
 }
 
+/**
+ * Get the merge base commit.
+ */
+export function listParentCommits(input: { sha: string }): string[] | null {
+  const context = createContext();
+  const service = getCiService(context);
+  if (!service) {
+    return null;
+  }
+  return service.listParentCommits(input, context);
+}
 /**
  * Get the CI environment.
  */
diff --git a/packages/core/src/ci-environment/services/bitrise.ts b/packages/core/src/ci-environment/services/bitrise.ts
index 915f43d..eccd02b 100644
--- a/packages/core/src/ci-environment/services/bitrise.ts
+++ b/packages/core/src/ci-environment/services/bitrise.ts
@@ -1,4 +1,4 @@
-import { getMergeBaseCommitSha } from "../git";
+import { getMergeBaseCommitSha, listParentCommits } from "../git";
 import type { Service, Context } from "../types";
 
 const getPrNumber = ({ env }: Context) => {
@@ -25,6 +25,7 @@ const service: Service = {
     };
   },
   getMergeBaseCommitSha,
+  listParentCommits,
 };
 
 export default service;
diff --git a/packages/core/src/ci-environment/services/buildkite.ts b/packages/core/src/ci-environment/services/buildkite.ts
index ef3f41c..f487328 100644
--- a/packages/core/src/ci-environment/services/buildkite.ts
+++ b/packages/core/src/ci-environment/services/buildkite.ts
@@ -1,5 +1,5 @@
 import type { Service } from "../types";
-import { head, branch, getMergeBaseCommitSha } from "../git";
+import { head, branch, getMergeBaseCommitSha, listParentCommits } from "../git";
 
 const service: Service = {
   name: "Buildkite",
@@ -24,6 +24,7 @@ const service: Service = {
     };
   },
   getMergeBaseCommitSha,
+  listParentCommits,
 };
 
 export default service;
diff --git a/packages/core/src/ci-environment/services/circleci.ts b/packages/core/src/ci-environment/services/circleci.ts
index cacc10c..37b8cf4 100644
--- a/packages/core/src/ci-environment/services/circleci.ts
+++ b/packages/core/src/ci-environment/services/circleci.ts
@@ -1,4 +1,4 @@
-import { getMergeBaseCommitSha } from "../git";
+import { getMergeBaseCommitSha, listParentCommits } from "../git";
 import type { Service, Context } from "../types";
 
 const getPrNumber = ({ env }: Context) => {
@@ -31,6 +31,7 @@ const service: Service = {
     };
   },
   getMergeBaseCommitSha,
+  listParentCommits,
 };
 
 export default service;
diff --git a/packages/core/src/ci-environment/services/git.ts b/packages/core/src/ci-environment/services/git.ts
index 9d5688e..e305f53 100644
--- a/packages/core/src/ci-environment/services/git.ts
+++ b/packages/core/src/ci-environment/services/git.ts
@@ -4,6 +4,7 @@ import {
   branch,
   checkIsGitRepository,
   getMergeBaseCommitSha,
+  listParentCommits,
 } from "../git";
 
 const service: Service = {
@@ -26,6 +27,7 @@ const service: Service = {
     };
   },
   getMergeBaseCommitSha,
+  listParentCommits,
 };
 
 export default service;
diff --git a/packages/core/src/ci-environment/services/github-actions.ts b/packages/core/src/ci-environment/services/github-actions.ts
index 25c3fd8..3596ec1 100644
--- a/packages/core/src/ci-environment/services/github-actions.ts
+++ b/packages/core/src/ci-environment/services/github-actions.ts
@@ -2,7 +2,7 @@ import { existsSync, readFileSync } from "node:fs";
 import type { Service, Context } from "../types";
 import axios from "axios";
 import { debug } from "../../debug";
-import { getMergeBaseCommitSha } from "../git";
+import { getMergeBaseCommitSha, listParentCommits } from "../git";
 
 type EventPayload = {
   pull_request?: {
@@ -177,6 +177,7 @@ const service: Service = {
     };
   },
   getMergeBaseCommitSha,
+  listParentCommits,
 };
 
 export default service;
diff --git a/packages/core/src/ci-environment/services/gitlab.ts b/packages/core/src/ci-environment/services/gitlab.ts
index 6321798..a06fb4d 100644
--- a/packages/core/src/ci-environment/services/gitlab.ts
+++ b/packages/core/src/ci-environment/services/gitlab.ts
@@ -1,4 +1,4 @@
-import { getMergeBaseCommitSha } from "../git";
+import { getMergeBaseCommitSha, listParentCommits } from "../git";
 import type { Service } from "../types";
 
 const service: Service = {
@@ -21,6 +21,7 @@ const service: Service = {
     };
   },
   getMergeBaseCommitSha,
+  listParentCommits,
 };
 
 export default service;
diff --git a/packages/core/src/ci-environment/services/heroku.ts b/packages/core/src/ci-environment/services/heroku.ts
index e23f6ad..3b21208 100644
--- a/packages/core/src/ci-environment/services/heroku.ts
+++ b/packages/core/src/ci-environment/services/heroku.ts
@@ -1,5 +1,5 @@
 import type { Service } from "../types";
-import { getMergeBaseCommitSha } from "../git";
+import { getMergeBaseCommitSha, listParentCommits } from "../git";
 
 const service: Service = {
   name: "Heroku",
@@ -19,6 +19,7 @@ const service: Service = {
     nonce: env.HEROKU_TEST_RUN_ID || null,
   }),
   getMergeBaseCommitSha,
+  listParentCommits,
 };
 
 export default service;
diff --git a/packages/core/src/ci-environment/services/travis.ts b/packages/core/src/ci-environment/services/travis.ts
index cc846ad..fe767b3 100644
--- a/packages/core/src/ci-environment/services/travis.ts
+++ b/packages/core/src/ci-environment/services/travis.ts
@@ -1,5 +1,5 @@
 import type { Context, Service } from "../types";
-import { getMergeBaseCommitSha } from "../git";
+import { getMergeBaseCommitSha, listParentCommits } from "../git";
 
 const getOwner = ({ env }: Context) => {
   if (!env.TRAVIS_REPO_SLUG) return null;
@@ -38,6 +38,7 @@ const service: Service = {
     };
   },
   getMergeBaseCommitSha,
+  listParentCommits,
 };
 
 export default service;
diff --git a/packages/core/src/ci-environment/types.ts b/packages/core/src/ci-environment/types.ts
index c27bb50..bae67a3 100644
--- a/packages/core/src/ci-environment/types.ts
+++ b/packages/core/src/ci-environment/types.ts
@@ -87,4 +87,10 @@ export interface Service {
     },
     ctx: Context,
   ): string | null;
+  listParentCommits(
+    input: {
+      sha: string;
+    },
+    ctx: Context,
+  ): string[] | null;
 }
diff --git a/packages/core/src/upload.ts b/packages/core/src/upload.ts
index b064834..68cb31f 100644
--- a/packages/core/src/upload.ts
+++ b/packages/core/src/upload.ts
@@ -13,7 +13,7 @@ import { debug, debugTime, debugTimeEnd } from "./debug";
 import { chunk } from "./util/chunk";
 import { getPlaywrightTracePath, readMetadata } from "@argos-ci/util";
 import { getArgosCoreSDKIdentifier } from "./version";
-import { getMergeBaseCommitSha } from "./ci-environment";
+import { getMergeBaseCommitSha, listParentCommits } from "./ci-environment";
 
 /**
  * Size of the chunks used to upload screenshots to Argos.
@@ -213,32 +213,50 @@ export async function upload(params: UploadParameters) {
   if (projectResponse.error) {
     throwAPIError(projectResponse.error);
   }
+  debug("Project fetched", projectResponse.data);
+
   const { defaultBaseBranch, hasRemoteContentAccess } = projectResponse.data;
-  const referenceBranch = config.referenceBranch || defaultBaseBranch;
+
   const referenceCommit = (() => {
     if (config.referenceCommit) {
       debug("Found reference commit in config", config.referenceCommit);
       return config.referenceCommit;
     }
 
+    // If we have remote access, we will fetch it from the Git Provider.
     if (hasRemoteContentAccess) {
       return null;
     }
 
-    // We use the pull request as base branch if possible.
-    const base = config.prBaseBranch || referenceBranch;
+    // We use the pull request as base branch if possible
+    // else branch specified by the user or the default branch.
+    const base =
+      config.referenceBranch || config.prBaseBranch || defaultBaseBranch;
 
     const sha = getMergeBaseCommitSha({ base, head: config.branch });
 
     if (sha) {
-      debug("Found reference commit from git", sha);
+      debug("Found merge base", sha);
     } else {
-      debug("No reference commit found in git");
+      debug("No merge base found");
     }
 
     return sha;
   })();
 
+  const parentCommits = (() => {
+    // If we have remote access, we will fetch them from the Git Provider.
+    if (hasRemoteContentAccess) {
+      return null;
+    }
+
+    if (referenceCommit) {
+      return listParentCommits({ sha: referenceCommit });
+    }
+
+    return [];
+  })();
+
   // Create build
   debug("Creating build");
   const [pwTraceKeys, screenshotKeys] = screenshots.reduce(
@@ -269,8 +287,9 @@ export async function upload(params: UploadParameters) {
       pwTraceKeys,
       prNumber: config.prNumber,
       prHeadCommit: config.prHeadCommit,
-      referenceBranch,
+      referenceBranch: config.referenceBranch,
       referenceCommit,
+      parentCommits,
       argosSdk,
       ciProvider: config.ciProvider,
       runId: config.runId,