diff --git a/.github/workflows/commit_message_check.yml b/.github/workflows/commit_message_check.yml
index 14e3f50..737492b 100644
--- a/.github/workflows/commit_message_check.yml
+++ b/.github/workflows/commit_message_check.yml
@@ -14,6 +14,7 @@ jobs:
     - name: checkout code
       uses: actions/checkout@v4
       with:
+        ref: ${{ github.event.pull_request.head.sha }}
         fetch-depth: 0
 
     - name: show logs