We should support checking out PRs on multiple remotes. This has advantage of supporting PRs from contributors who haven't put their GitHub Usernames in metadata/contributors.json yet as well.
<rdar://problem/92300209>
Pull request: https://github.com/WebKit/WebKit/pull/384
Committed r293476 (250012@main): <https://commits.webkit.org/250012@main> Reviewed commits have been landed. Closing PR #384 and removing active labels.