$ git clone -n https://src.fedoraproject.org/rpms/python-cssmin.git /var/lib/mock/f45-build-30142-643/root/chroot_tmpdir/scmroot/python-cssmin
Cloning into '/var/lib/mock/f45-build-30142-643/root/chroot_tmpdir/scmroot/python-cssmin'...
$ git fetch origin 0d53e63e8655fd148b13dae89716ce46251105f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-cssmin
 * [new ref]         0d53e63e8655fd148b13dae89716ce46251105f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d53e63 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild