$ git clone -n https://src.fedoraproject.org/rpms/plasma-activities-stats.git /var/lib/mock/f42-build-side-1-3554995-46650/root/chroot_tmpdir/scmroot/plasma-activities-stats
Cloning into '/var/lib/mock/f42-build-side-1-3554995-46650/root/chroot_tmpdir/scmroot/plasma-activities-stats'...
$ git fetch origin c6d97433bc9ef9022e00ba87110339c739aefc05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-activities-stats
 * [new ref]         c6d97433bc9ef9022e00ba87110339c739aefc05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6d9743 6.4.0