From fe0e278706b7354104ffe9353a17f789f72dda90 Mon Sep 17 00:00:00 2001
From: Greg Chadwick <gac@lowrisc.org>
Date: Mon, 8 May 2023 15:55:53 +0100
Subject: [PATCH] Fixes foo

---
 .github/workflows/pr_change_check.yml | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/pr_change_check.yml b/.github/workflows/pr_change_check.yml
index dd876e03026199..56002de705afe6 100644
--- a/.github/workflows/pr_change_check.yml
+++ b/.github/workflows/pr_change_check.yml
@@ -21,13 +21,9 @@ jobs:
 
       - name: Determine changed files
         run: |
-          tgt_branch="${{ github.base_ref }}"
-          merge_base="$(git merge-base HEAD origin/$tgt_branch)" || {
-              echo >&2 "Failed to find fork point for origin/$tgt_branch."
-              exit 1
-          }
-          echo "Considering changes since $merge_base"
-          git diff --name-only "$merge_base" > $HOME/changed_files
+          git fetch origin
+          tgt_ref="${{ github.base_ref }}"
+          git diff --name-only HEAD "origin/$tgt_ref" > $HOME/changed_files
 
       - name: Show files changed
         run: cat $HOME/changed_files