diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 2c4a43ba..86cfe747 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -92,8 +92,10 @@ jobs:
           git pull github ${GITHUB_REF} --ff-only
           
           # DEBUG
-          echo "$(git log --format='%ae' --reverse | head -1)"
-          echo "$(git log --reverse | head -5)"
+          echo "ref: ${GITHUB_REF}"
+          echo "reverse email: $(git log --format='%ae' --reverse | head -1)"
+          echo "no reverse commit info: $(git log | head -5)"
+          echo "reverse commit info: $(git log --reverse | head -5)"
 
           # Get name & email from 1st commit
           git config --local user.email "$(git log --format='%ae' --reverse | head -1)"