$ git clone -n https://src.fedoraproject.org/rpms/kf6-kfilemetadata.git /var/lib/mock/f42-build-862107-170665/root/chroot_tmpdir/scmroot/kf6-kfilemetadata
Cloning into '/var/lib/mock/f42-build-862107-170665/root/chroot_tmpdir/scmroot/kf6-kfilemetadata'...
$ git fetch origin 02dcb48e5ce4189087ddeadd7b0810b633ec705a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kfilemetadata
 * [new ref]         02dcb48e5ce4189087ddeadd7b0810b633ec705a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02dcb48 6.8.0