feat(ci): set `fetch-depth: 0` in trufflehog checkout step (#31663)

.github/workflows/trufflehog.yml

@@ -10,20 +10,9 @@ jobs:
   trufflehog:
     runs-on: ubuntu-latest
     steps:
-    - shell: bash
-      run: |
-        if [ "${{ github.event_name }}" == "push" ]; then
-          echo "depth=$(($(jq length <<< '${{ toJson(github.event.commits) }}') + 2))" >> $GITHUB_ENV
-          echo "branch=${{ github.ref_name }}" >> $GITHUB_ENV
-        fi
-        if [ "${{ github.event_name }}" == "pull_request" ]; then
-          echo "depth=$((${{ github.event.pull_request.commits }}+2))" >> $GITHUB_ENV
-          echo "branch=${{ github.event.pull_request.head.ref }}" >> $GITHUB_ENV
-        fi
-    - name: Checkout code
-      uses: actions/checkout@v4
-      with:
-        ref: ${{env.branch}}
-        fetch-depth: ${{env.depth}}
-    - name: Secret Scanning
-      uses: trufflesecurity/trufflehog@main
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Secret Scanning
+        uses: trufflesecurity/trufflehog@main