git-webkit clean should be able to target an alternate remote.
<rdar://problem/92410887>
Pull request: https://github.com/WebKit/WebKit/pull/414
Pull request: https://github.com/apple/WebKit/pull/2
Committed r293545 (250065@main): <https://commits.webkit.org/250065@main> Reviewed commits have been landed. Closing PR #414 and removing active labels.