$ git clone -n https://src.fedoraproject.org/rpms/kscreenlocker.git /var/lib/mock/f41-build-860429-168945/root/chroot_tmpdir/scmroot/kscreenlocker
Cloning into '/var/lib/mock/f41-build-860429-168945/root/chroot_tmpdir/scmroot/kscreenlocker'...
$ git fetch origin 08e0b69f838a580c6ea987ce40679fea9ae3f67a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kscreenlocker
 * [new ref]         08e0b69f838a580c6ea987ce40679fea9ae3f67a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08e0b69 6.2.2