$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-directory.git /var/lib/mock/f38-build-side-42-init-devel-1120380-30230/root/chroot_tmpdir/scmroot/ghc-http-directory
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1120380-30230/root/chroot_tmpdir/scmroot/ghc-http-directory'...
$ git fetch origin bc162d68fc1663956ac209a573c6a5c3ce8eb538:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-directory
 * [new ref]         bc162d68fc1663956ac209a573c6a5c3ce8eb538 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc162d6 Convert to %autorelease and %autochangelog