RDO missing signature?

shell.txt

[major@indium tmp]$ wget https://rdoproject.org/repos/rdo-release.rpm
[major@indium tmp]$ rpm -qpi rdo-release.rpm 
Name        : rdo-release
Version     : ocata
Release     : 2
Architecture: noarch
Install Date: (not installed)
Group       : System Environment/Base
Size        : 3295
License     : Apache2
Signature   : (none)
Source RPM  : rdo-release-ocata-2.src.rpm
Build Date  : Wed 22 Feb 2017 10:20:10 AM CST
Build Host  : c1bj.rdu2.centos.org
Relocations : (not relocatable)
Packager    : CBS <cbs@centos.org>
Vendor      : CentOS
URL         : https://github.com/rdo-infra/rdo-release
Summary     : RDO repository configuration
Description :
This package contains the RDO repository