It’s a common workflow to fork a Bitbucket repository and submit pull requests from the fork.
Unfortunately there doesn’t seem to be any easy way to mirror the upstream repository’s permissions, and the default fork permissions are only for the creator of the fork. This makes it difficult for reviewers of the pull request to work with the changes. It also seems to risk fork authors inadvertently granting broader access than the upstream.
Seems like we should offer a convenient “only me” or “upstream access group” option for forked repository permissions, with customized access groups for forks being the exception, not the rule.