$ git clone -n https://src.fedoraproject.org/rpms/plasma-discover.git /var/lib/mock/f42-build-862470-170829/root/chroot_tmpdir/scmroot/plasma-discover
Cloning into '/var/lib/mock/f42-build-862470-170829/root/chroot_tmpdir/scmroot/plasma-discover'...
$ git fetch origin 641a48a7606431410534f0362c817623ed5ffacd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-discover
 * [new ref]         641a48a7606431410534f0362c817623ed5ffacd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 641a48a 6.2.4