$ git clone -n https://src.fedoraproject.org/rpms/plasma-print-manager.git /var/lib/mock/f42-build-side-1-3566284-46733/root/chroot_tmpdir/scmroot/plasma-print-manager
Cloning into '/var/lib/mock/f42-build-side-1-3566284-46733/root/chroot_tmpdir/scmroot/plasma-print-manager'...
$ git fetch origin bfc5f3d53d1fbe6981a6869aa9c43e3d6c70fc86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-print-manager
 * [new ref]         bfc5f3d53d1fbe6981a6869aa9c43e3d6c70fc86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bfc5f3d 6.4.0