$ git clone -n https://src.fedoraproject.org/rpms/python-jsonref.git /var/lib/mock/f45-build-31205-651/root/chroot_tmpdir/scmroot/python-jsonref
Cloning into '/var/lib/mock/f45-build-31205-651/root/chroot_tmpdir/scmroot/python-jsonref'...
$ git fetch origin f3ffb36cddc9a942d6263ce27cbf9a10a2157da0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jsonref
 * [new ref]         f3ffb36cddc9a942d6263ce27cbf9a10a2157da0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3ffb36 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild