fix?

.github/workflows/infra.yaml

@@ -18,15 +18,12 @@ jobs:
     name: Check infrastructure definitions
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout target
+      - name: Checkout
         uses: actions/checkout@v3
-        with:
-          ref: ${{ github.event.pull_request.base.ref }}
 
-      - name: Checkout PR
-        uses: actions/checkout@v3
-        with:
-          clean: false
+      - name: Fetch target
+        run: |
+          git fetch --no-tags --progress --no-recurse-submodules --depth=1 origin ${{ github.event.pull_request.base.ref }}
 
       - run: |
           echo !${{ github.event.pull_request.base.repo }} !${{ github.event.pull_request.base.sha }}