try without fetch-depth

Author: lobsterkatie

.github/workflows/build.yml

@@ -47,11 +47,11 @@ jobs:
         uses: actions/checkout@v2
         with:
           ref: ${{ env.HEAD_COMMIT }}
-          fetch-depth: 2
+          # fetch-depth: 2
       - name: Get PR head SHA
         run: echo "HEAD_SHA=${{ github.event.pull_request.head.sha }}" >> $GITHUB_ENV
-      - name: Setup tmate session
-        uses: mxschmitt/action-tmate@v3
+      # - name: Setup tmate session
+      #   uses: mxschmitt/action-tmate@v3
       - name: Get commit message
         run: |
           echo "COMMIT_MESSAGE=$(git log -n 1 --pretty=format:%s ${{ github.event.pull_request.head.sha }})" >> $GITHUB_ENV