ci: clang-tidy: fix checkout procedure

Author: hmaciak

.github/workflows/clang-tidy.yml

@@ -38,7 +38,6 @@ jobs:
       - name: Checkout oneDNN
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
-          ref: ${{ github.event.pull_request.head.ref }}
           fetch-depth: 0
           repository: ${{ github.event.pull_request.head.repo.full_name }}
 
@@ -56,7 +55,7 @@ jobs:
         run: |
           echo -e "Checking Clang-Tidy $(clang-tidy --version)\n"
           touch source-check.log
-          for file in $(git diff --name-only ${{ github.event.pull_request.base.sha }} | grep -E '\.cpp$'); 
+          for file in $(git diff --name-only ${{ github.event.pull_request.head.sha }} ${{ github.event.pull_request.base.sha }} | grep -E '\.cpp$'); 
           do
             if grep -q "$file" "build/compile_commands.json"; then
               echo -e "\nAnalyzing $file"
@@ -74,7 +73,7 @@ jobs:
         run: |
           echo -e "Checking Clang-Tidy $(clang-tidy --version)\n"
           touch headers-check.log
-          for file in $(git diff --name-only ${{ github.event.pull_request.base.sha }} | grep -E '\.cpp$'); 
+          for file in $(git diff --name-only ${{ github.event.pull_request.head.sha }} ${{ github.event.pull_request.base.sha }} | grep -E '\.cpp$'); 
           do
             if grep -q "$file" "build/compile_commands.json"; then
               echo -e "\nAnalyzing $file"