fix: including non branch changes in diff output (#973)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

.github/workflows/test.yml

@@ -210,6 +210,7 @@ jobs:
       matrix:
         platform: [ubuntu-latest]
         fetch-depth: [1, 2]
+        input-fetch_depth: [1, 50]
 
     steps:
       - name: Checkout to branch
@@ -220,6 +221,8 @@ jobs:
       - name: Run changed-files
         id: changed-files
         uses: ./
+        with:
+          fetch_depth: ${{ matrix.input-fetch_depth }}
 
       - name: Show output
         run: |