fix: enhance checkout process by configuring default remote and ensuring proper branch checkouts

Author: MishaKav

action.yml

@@ -132,10 +132,13 @@ runs:
       run: |
         ALL=2147483647
         cd gitstream && cd repo
+        git config checkout.defaultRemote origin
         git fetch --deepen=$ALL origin $'${{ steps.safe-strings.outputs.base_ref }}'
         git remote add upstream $'${{ steps.safe-strings.outputs.url }}'
         git fetch --deepen=$ALL upstream $'${{ steps.safe-strings.outputs.head_ref }}'
         git checkout -b $'upstream/${{ steps.safe-strings.outputs.head_ref}}' $'upstream/${{ steps.safe-strings.outputs.head_ref}}'
+        git checkout $'${{ steps.safe-strings.outputs.base_ref }}'
+        git checkout $'${{ steps.safe-strings.outputs.head_ref }}'
 
     - name: Create cm folder
       if: ${{ env.SHOULD_CHECKOUT == 'true' }}