$ git clone -n https://src.fedoraproject.org/rpms/lightdm-gtk.git /var/lib/mock/f45-build-17373-498/root/chroot_tmpdir/scmroot/lightdm-gtk
Cloning into '/var/lib/mock/f45-build-17373-498/root/chroot_tmpdir/scmroot/lightdm-gtk'...
$ git fetch origin 9dd0b9ea3486447c539a09d6f0ea76298601e2e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lightdm-gtk
 * [new ref]         9dd0b9ea3486447c539a09d6f0ea76298601e2e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9dd0b9e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild