$ git clone -n https://src.fedoraproject.org/rpms/colord-gtk.git /var/lib/mock/f40-build-792970-138688/root/chroot_tmpdir/scmroot/colord-gtk
Cloning into '/var/lib/mock/f40-build-792970-138688/root/chroot_tmpdir/scmroot/colord-gtk'...
$ git fetch origin 1ca35ce7526bf6ae03487579e6c54490cab7f9e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/colord-gtk
 * [new ref]         1ca35ce7526bf6ae03487579e6c54490cab7f9e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ca35ce New upstream version