set depth to 0

Author: Feiyang1

.github/workflows/changesets.yml

@@ -12,6 +12,9 @@ jobs:
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v2
+        with:
+          ## fetch all history for all branches and tags, so we can compare with master
+          fetch-depth: 0
 
       - name: Show branches
         run: git branch