diff --git a/internal/git/git.go b/internal/git/git.go
index a35cb19..59cd9cf 100644
--- a/internal/git/git.go
+++ b/internal/git/git.go
@@ -92,6 +92,13 @@ func EnsureBranchCommit(ctx context.Context, repo, branch string, env []string)
 	if err != nil {
 		return err
 	}
+	_, stderr, code, err := runNetwork(ctx, repo, "push", Remote, commit+":refs/heads/"+branch)
+	if err != nil {
+		return err
+	}
+	if code != 0 {
+		return fmt.Errorf("pushing %s to %s: exit status %d: %s", branch, Remote, code, stderr)
+	}
 	_, err = run(ctx, repo, "update-ref", "refs/heads/"+branch, commit, "")
 	return err
 }