diff --git a/.github/workflows/clang-format-checker.yml b/.github/workflows/clang-format-checker.yml
index 1c69d6de86..d1887e4519 100644
--- a/.github/workflows/clang-format-checker.yml
+++ b/.github/workflows/clang-format-checker.yml
@@ -13,9 +13,16 @@ jobs:
       pull-requests: write
     steps:
       - name: Fetch LLVM sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
-          fetch-depth: 2
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: Checkout through merge base
+        uses: rmacklin/fetch-through-merge-base@bfe4d03a86f9afa52bc1a70e9814fc92a07f7b75 # v0.3.0
+        with:
+          base_ref: ${{ github.event.pull_request.base.ref }}
+          head_ref: ${{ github.event.pull_request.head.sha }}
+          deepen_length: 500
 
       - name: Get changed files
         id: changed-files
diff --git a/tools/clang/unittests/DxrFallback/ShaderTesterImpl.cpp b/tools/clang/unittests/DxrFallback/ShaderTesterImpl.cpp
index 08ae2c3c75..ff95602ef5 100644
--- a/tools/clang/unittests/DxrFallback/ShaderTesterImpl.cpp
+++ b/tools/clang/unittests/DxrFallback/ShaderTesterImpl.cpp
@@ -363,7 +363,7 @@ void ShaderTesterImpl::initPipeline() {
     std::vector<char> computeShaderBuffer;
     ComPtr<ID3DBlob> computeShaderBlob;
     if (m_blob) {
-      bytecode = CD3DX12_SHADER_BYTECODE(m_blob.Get());
+bytecode = CD3DX12_SHADER_BYTECODE(m_blob.Get());
     } else if (m_filename.find(L".cso") != std::wstring::npos) {
       ReadFileToBuffer(m_filename, computeShaderBuffer);
       bytecode = CD3DX12_SHADER_BYTECODE(computeShaderBuffer.data(),
@@ -547,4 +547,4 @@ void ShaderTesterImpl::printLog(int *log) {
   for (int i = 0; i < count; ++i)
     std::cout << pos[i] << " ";
   std::cout << "\n";
-}
\ No newline at end of file
+}