add full checkout to workflow build

Author: eksrha

.github/workflows/branchPR.yaml

@@ -18,6 +18,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
       - name: Set up Go
         uses: actions/setup-go@v2
         with: