From 55d69d74b703e419da5b29e954e7cf3ddecee74a Mon Sep 17 00:00:00 2001
From: Aolin <aolin.zhang@pingcap.com>
Date: Tue, 26 May 2026 17:12:29 +0800
Subject: [PATCH] ci: compare deleted media against PR base branch

---
 .github/workflows/prevent-deletion.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/prevent-deletion.yaml b/.github/workflows/prevent-deletion.yaml
index e1961dfc500a6..a22c250f2ddfa 100644
--- a/.github/workflows/prevent-deletion.yaml
+++ b/.github/workflows/prevent-deletion.yaml
@@ -17,6 +17,7 @@ jobs:
       - name: Checkout base
         uses: actions/checkout@v4
         with:
+          ref: ${{ github.event.pull_request.base.sha }}
           fetch-depth: 0
       - name: Fetch head
         env: