Adjust depth

Author: boomanaiden154

.github/workflows/premerge.yaml

@@ -15,6 +15,8 @@ jobs:
     steps:
       - name: Checkout LLVM
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
       - name: Build and Test
         run: |
           ${MODIFIED_FILES:=$(git diff --name-only HEAD~1...HEAD)}