[FEATURE] changed checkout process

whenever a feature or bugfix branch needs to be tagged,
git needs to checkout the branch first to check if a diff exists

1. git is now fetching origin to get all remote branches
2. then git is checking out the branch
   2.1 if: no local branch exists git will create it with argument -b
   2.2 else: local branch exists, git will checkout the local branch
   3 - end. business as usual