$ git clone -n https://src.fedoraproject.org/rpms/gtypist.git /var/lib/mock/f42-build-side-1-3533232-46361/root/chroot_tmpdir/scmroot/gtypist
Cloning into '/var/lib/mock/f42-build-side-1-3533232-46361/root/chroot_tmpdir/scmroot/gtypist'...
$ git fetch origin 9b966750147f38a5e38464bae637419937595772:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtypist
 * [new ref]         9b966750147f38a5e38464bae637419937595772 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b96675 Update to 2.10.1