$ git clone -n https://src.fedoraproject.org/rpms/kf6-kfilemetadata.git /var/lib/mock/f42-build-863263-171569/root/chroot_tmpdir/scmroot/kf6-kfilemetadata
Cloning into '/var/lib/mock/f42-build-863263-171569/root/chroot_tmpdir/scmroot/kf6-kfilemetadata'...
$ git fetch origin dd952f23945f79d6db5ebf3c44d1c2d741d5cdb1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kfilemetadata
 * [new ref]         dd952f23945f79d6db5ebf3c44d1c2d741d5cdb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd952f2 Frameworks 6.9