diff --git a/.github/workflows/commit_message_check.yml b/.github/workflows/commit_message_check.yml
index 804e6d2..3578793 100644
--- a/.github/workflows/commit_message_check.yml
+++ b/.github/workflows/commit_message_check.yml
@@ -13,7 +13,7 @@ jobs:
         fetch-depth: 0
 
     - name: get main
-      run: git fetch origin main --depth 1
+      run: git fetch --unshallow origin main
 
     - name: list branches
       run: git branch -v