$ git clone -n https://src.fedoraproject.org/rpms/kf5-kdesu.git /var/lib/mock/f40-build-1258370-23032/root/chroot_tmpdir/scmroot/kf5-kdesu
Cloning into '/var/lib/mock/f40-build-1258370-23032/root/chroot_tmpdir/scmroot/kf5-kdesu'...
$ git fetch origin 7644db376798b9581fd7b91ede956de6e284d06a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kdesu
 * [new ref]         7644db376798b9581fd7b91ede956de6e284d06a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7644db3 5.116.0