Currently, when you rebase a branch that has a pull request open, it shows "adding commit X, removing commit X". This clutters the log a lot, especially when there are several rebases, and it makes it hard to distinguish real changes from the PR submitter from rebases.

Ideally, Bitbucket would identify that those changes are rebases, and show an appropriate message. Then, it would keep track of the changes that are really part of the pull request.