$ git clone -n https://src.fedoraproject.org/rpms/lightdm.git /var/lib/mock/f45-build-17374-498/root/chroot_tmpdir/scmroot/lightdm
Cloning into '/var/lib/mock/f45-build-17374-498/root/chroot_tmpdir/scmroot/lightdm'...
$ git fetch origin a6bfb44435c5d6a074511393a513535f3bdc4758:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lightdm
 * [new ref]         a6bfb44435c5d6a074511393a513535f3bdc4758 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6bfb44 Drop patch