check if release series branch already exist

.github/workflows/pre_release_prepare.yml

@@ -34,6 +34,7 @@ jobs:
       - name: Create branches
         run: |
           if git ls-remote --heads origin release/${MAJOR_MINOR}.x; then
+          git fetch origin release/${MAJOR_MINOR}.x
           echo "Branch release/${MAJOR_MINOR}.x already exists, checking out."
           git checkout "release/${MAJOR_MINOR}.x"
           else