$ git clone -n https://src.fedoraproject.org/rpms/kf5-kdesu.git /var/lib/mock/f40-build-742170-110610/root/chroot_tmpdir/scmroot/kf5-kdesu
Cloning into '/var/lib/mock/f40-build-742170-110610/root/chroot_tmpdir/scmroot/kf5-kdesu'...
$ git fetch origin 226cdedce39f4243657b0ae7216f386092da0180:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kdesu
 * [new ref]         226cdedce39f4243657b0ae7216f386092da0180 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 226cded 5.111.0