Because we canonicalize commits, we need to explicitly run `git svn fetch` to pair Subversion revisions to existing canonicalized commits.
<rdar://problem/91258277>
Pull request: https://github.com/WebKit/WebKit/pull/243
Committed r292509 (249352@main): <https://commits.webkit.org/249352@main> Reviewed commits have been landed. Closing #243 and removing active labels.