Increase fetch-depth

.github/workflows/macos.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@master
         with:
-          fetch-depth: 20
+          fetch-depth: 50
       - name: Set ENV
         run: |
           echo '##[set-env name=JOBS]'-j$((1 + $(sysctl -n hw.activecpu)))