$ git clone -n https://src.fedoraproject.org/rpms/kscreenlocker.git /var/lib/mock/f41-build-853319-166698/root/chroot_tmpdir/scmroot/kscreenlocker
Cloning into '/var/lib/mock/f41-build-853319-166698/root/chroot_tmpdir/scmroot/kscreenlocker'...
$ git fetch origin 3d4484f938228101cbaf3e7e0b72d6d562f08025:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kscreenlocker
 * [new ref]         3d4484f938228101cbaf3e7e0b72d6d562f08025 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d4484f 6.1.90