Why would rebase require force-pushing? You can always rebase the pull request on the most current master. There would be no conflicts then and no need to force

Why would rebase require force-pushing? You can always rebase the pull request on the most current master. There would be no conflicts then and no need to force-push. If the push fails because the master has changed during the few minutes you spent in rebasing, just rebase again on the most current master and push again. No force-push is required.