Set Setpgid on child git processes

modules/git/command.go

@@ -157,6 +157,7 @@ func (c *Command) Run(opts *RunOpts) error {
 		"GIT_NO_REPLACE_OBJECTS=1",
 	)
 
+	setSysProcAttribute(cmd)
 	cmd.Dir = opts.Dir
 	cmd.Stdout = opts.Stdout
 	cmd.Stderr = opts.Stderr

modules/git/command_unix.go

@@ -0,0 +1,16 @@
+// Copyright 2016 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+//go:build !windows
+
+package git
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func setSysProcAttribute(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+}

modules/git/command_windows.go

@@ -0,0 +1,15 @@
+// Copyright 2016 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+//go:build windows
+
+import (
+	"os/exec"
+)
+
+package git
+
+func setSysProcAttribute(cmd *exec.Cmd) {
+	// Do nothing
+}