git-webkit setup should run `git fetch --prune --all` to ensure all remotes are in their canonical state.
<rdar://problem/106371364>
Pull request: https://github.com/WebKit/WebKit/pull/26994
Committed 279288@main (986aba150fc6): <https://commits.webkit.org/279288@main> Reviewed commits have been landed. Closing PR #26994 and removing active labels.
Committed 272448.1058@safari-7618-branch (4b6eb093f720): <https://commits.webkit.org/272448.1058@safari-7618-branch> Reviewed commits have been landed. Closing PR #1313 and removing active labels.