$ git clone -n https://src.fedoraproject.org/rpms/lightdm-gtk.git /var/lib/mock/f41-build-side-1-2647772-27313/root/chroot_tmpdir/scmroot/lightdm-gtk
Cloning into '/var/lib/mock/f41-build-side-1-2647772-27313/root/chroot_tmpdir/scmroot/lightdm-gtk'...
$ git fetch origin 7aa77ca7f34d59c0b4b234ae48195e7a9e759115:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lightdm-gtk
 * [new ref]         7aa77ca7f34d59c0b4b234ae48195e7a9e759115 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7aa77ca convert GPLv3+ license to SPDX