diff --git a/.github/workflows/commit_message_check.yml b/.github/workflows/commit_message_check.yml
index 04bcbce..737492b 100644
--- a/.github/workflows/commit_message_check.yml
+++ b/.github/workflows/commit_message_check.yml
@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - main
-  pull-request:
+  pull_request:
 
 jobs:
   check_commit_messages:
@@ -14,8 +14,12 @@ jobs:
     - name: checkout code
       uses: actions/checkout@v4
       with:
+        ref: ${{ github.event.pull_request.head.sha }}
         fetch-depth: 0
 
+    - name: show logs
+      run: git log --format="%s" origin/main..HEAD
+
     - name: check commit messages
       run: |
         git log --format="%s" origin/main..HEAD | while IFS= read -r message; do