Not necessarily - there's multiple ways to collapse at least one branch's history into another repo e.g. from https://github.com/arkie/proto read repo; git fetch ../$repo/ master:$repo; git push origin $repo
Not necessarily - there's multiple ways to collapse at least one branch's history into another repo e.g. from https://github.com/arkie/proto read repo; git fetch ../$repo/ master:$repo; git push origin $repo