fix git checkout?

Author: mydea

.github/workflows/build.yml

@@ -130,10 +130,8 @@ jobs:
       - name: Check out current commit
         uses: actions/checkout@v5
         with:
-          ref: ${{ env.HEAD_COMMIT }}
           fetch-depth: 0
 
-
       - name: Check if master is not ahead of develop
         run: |
           # Get commit counts: left=develop unique commits, right=master unique commits