$ git clone -n https://src.fedoraproject.org/rpms/gmic.git /var/lib/mock/f40-build-2145950-50880/root/chroot_tmpdir/scmroot/gmic
Cloning into '/var/lib/mock/f40-build-2145950-50880/root/chroot_tmpdir/scmroot/gmic'...
$ git fetch origin fbcecc346f59dca2364678af0ab443434fa2e67a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gmic
 * [new ref]         fbcecc346f59dca2364678af0ab443434fa2e67a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbcecc3 bump version