diff --git a/.azurepipelines/Windows-EccCheck.yml b/.azurepipelines/Windows-EccCheck.yml
index 444a2afcb4662..e36acc8aa4b92 100644
--- a/.azurepipelines/Windows-EccCheck.yml
+++ b/.azurepipelines/Windows-EccCheck.yml
@@ -36,5 +36,8 @@ steps:
   displayName: 'check py version'
 
 - script: |
+    git fetch origin $(System.PullRequest.TargetBranch):$(System.PullRequest.TargetBranch)
+    git checkout $(System.PullRequest.TargetBranch)
+    git show -2 --unified=0
     py -3 BaseTools/Scripts/EccCheck.py -1
   displayName: 'Use EccCheck.py to verify patch series in pull request'