git - Upstream merge commits in pull request -

git - Upstream merge commits in pull request -

when doing open source development it's normal track against upstream period of time while doing changes on topic branch. 1 of things have noticed when bringing upstream merge commit created. if create pull request merge commit ends part of pr.

my question is, there harm in this? have read people sense useless fact deed timestamp against when lastly synced upstream. there accepted practice tracking upstream , introducing merge commits.

when bringing upstream merge commit created.

that why preferable to:

git rebase master (rebase branch on top of updated remote tracking branch) git force -f (force pushing branch github fork: existing pr updated accordingly)

that works if:

your pr done in own branch nobody else actively using branch

git