$ git clone -n https://src.fedoraproject.org/rpms/plasma-discover.git /var/lib/mock/f41-build-851493-165983/root/chroot_tmpdir/scmroot/plasma-discover
Cloning into '/var/lib/mock/f41-build-851493-165983/root/chroot_tmpdir/scmroot/plasma-discover'...
$ git fetch origin 7bc21878153f8e5b71704140b13317a6af030bce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-discover
 * [new ref]         7bc21878153f8e5b71704140b13317a6af030bce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bc2187 6.1.90