ci: set fetch depth to 0 (#1061)

Closes #1060

Author: yeikel

.github/workflows/github.yml

@@ -86,7 +86,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-
+        with:
+         fetch-depth: 0
       - name: Setup Java
         uses: actions/setup-java@v1
         with: