Re: 'git branch' when origin branch with same name exists

Phil Hord [off-list ref] writes:

Maybe you can suggest the advice verbiage which you think would have
helped this user.

Requiring starting point and failing without --force will never
happen, but it could be a possible approach to issue an additional
advice message under reasonably narrow conditions, namely:

 - The starting point was not given explicitly;

 - It would have DWIMed to "git checkout -t -b it origin/it" when
   creating the branch (I think you need to check configurations
   like branch.autosetupmerge and existence of the tracking branch
   remotes/origin/it); and

 - advice.branchNotTrackingCorrespondingRemote is not set to false.