Rebase base on top of upstream

[liyishuai]

Say I've only made a small change in my fork, but the upstream updates frequently.
The current mergeMethod: rebase puts upstream commits on top of base, causing base to diverge more and more from upstream.
Is there a way to rebase base on top of upstream, so that they only differ in a few commits?

[wei]

Pull uses the same behavior has merging a GitHub pull request with "rebase and merge". I don't think GitHub pull requests allow for the behavior that you're looking for. Please try it yourself and let me know if it is possible. Otherwise, I suggest you use merge instead or write a GitHub action to do this.

[liyishuai]

You're right. GitHub pull requests doesn't allow the "reverse rebase", which implies force-pushing to the base branch.
merge seems feasible; the only drawback is plenty merge commits. This can be cleared by a manual rebase on top of upstream and then force-push to base branch. I hope this won't require re-resolving merge conflicts.