$ git clone -n https://src.fedoraproject.org/rpms/kscreenlocker.git /var/lib/mock/f40-build-2237554-53543/root/chroot_tmpdir/scmroot/kscreenlocker
Cloning into '/var/lib/mock/f40-build-2237554-53543/root/chroot_tmpdir/scmroot/kscreenlocker'...
$ git fetch origin 6fcd8d6087e14739988e808072b86e108c511841:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kscreenlocker
 * [new ref]         6fcd8d6087e14739988e808072b86e108c511841 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fcd8d6 5.92.0