$ git clone -n https://src.fedoraproject.org/rpms/R-qtl.git /var/lib/mock/f38-build-724488-99434/root/chroot_tmpdir/scmroot/R-qtl
Cloning into '/var/lib/mock/f38-build-724488-99434/root/chroot_tmpdir/scmroot/R-qtl'...
$ git fetch origin 22d1d7ba994080f8a99bfead42b3df88c055e130:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-qtl
 * [new ref]         22d1d7ba994080f8a99bfead42b3df88c055e130 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 22d1d7b Update to 1.60