Create branch if not exist instead of error

Author: jrandiny

entrypoint.py

@@ -72,9 +72,10 @@
     git_repo = git.Repo.clone_from(
         'https://{}@github.com/{}.git'.format(github_token, github_repo),
         github_slug,
-        branch=gh_branch,
     )
 
+    git_repo.git.branch(gh_branch)
+
     # Generate metadata
     deb_file_handle = DebFile(filename=deb_file_path)
     deb_file_control = deb_file_handle.debcontrol()