chore: add deep clone in test workflow

.github/workflows/ci.yaml

@@ -31,6 +31,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        # we need the entire history here because we use commits from the past for testing.
+        fetch-depth: 0
     - uses: pdm-project/setup-pdm@v4
       with:
         python-version: '3.9'

.gitignore

@@ -9,6 +9,7 @@
 .pdm-build/
 .pdm-python
 .pdm.toml
+.python-version
 .tox/
 .venv/
 .vscode/

gitmind/utils/commit.py

@@ -45,15 +45,18 @@ def get_commit(*, repo: Repository, commit_hex: str) -> Commit:
         commit_hex: The SHA hex of the commit to retrieve.
 
     Raises:
-        ValueError: If the object with the given SHA is not a commit.
+        ValueError: If the object with the given SHA is not a commit or if the commit is not found.
 
     Returns:
         The commit object.
     """
-    git_object = repo.revparse_single(commit_hex)
-    if isinstance(git_object, Commit):
-        return git_object
-    raise ValueError(f"GIT object with SHA hex {commit_hex} is not a commit.")
+    try:
+        git_object = repo.revparse_single(commit_hex)
+        if isinstance(git_object, Commit):
+            return git_object
+        raise ValueError(f"GIT object with SHA hex {commit_hex} is not a commit.")
+    except KeyError as e:
+        raise ValueError(f"Commit with SHA hex {commit_hex} not found.") from e
 
 
 def extract_commit_data(*, repo: Repository, commit_hex: str) -> tuple[CommitStatistics, CommitMetadata, str]: