$ git clone -n https://src.fedoraproject.org/rpms/kscreenlocker.git /var/lib/mock/f40-build-795560-140206/root/chroot_tmpdir/scmroot/kscreenlocker
Cloning into '/var/lib/mock/f40-build-795560-140206/root/chroot_tmpdir/scmroot/kscreenlocker'...
$ git fetch origin e9cb0b5a3351a9f66eb18700816b3d0f103b1662:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kscreenlocker
 * [new ref]         e9cb0b5a3351a9f66eb18700816b3d0f103b1662 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9cb0b5 6.0.2