Amap and PVS Studio reports in CI/CD (#1526)

.github/workflows/check_submodules.yml

@@ -25,6 +25,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
 
       - name: 'Check protobuf branch'
         run: |