I strongly support this, thanks for suggesting it @mbasmanova. You probably have already thought of these, but I'm just dropping some tips from other projects that have done this:
Probably should add branch protection on master (including administrators) to prevent pushes after the changeover.
If external sources link directly to files in the repo, I've been changing the branch name to HEAD wherever possible so it resolves before and after the changeover.
I strongly support this, thanks for suggesting it @mbasmanova. You probably have already thought of these, but I'm just dropping some tips from other projects that have done this:
master(including administrators) to prevent pushes after the changeover.HEADwherever possible so it resolves before and after the changeover.