$ git clone -n https://src.fedoraproject.org/rpms/python-specfile.git /var/lib/mock/f40-build-2677034-67879/root/chroot_tmpdir/scmroot/python-specfile
Cloning into '/var/lib/mock/f40-build-2677034-67879/root/chroot_tmpdir/scmroot/python-specfile'...
$ git fetch origin 832c1bfa0395ebf46fbfd84d3dae30fb942007f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-specfile
 * [new ref]         832c1bfa0395ebf46fbfd84d3dae30fb942007f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 832c1bf [packit] 0.28.1 upstream release