title: Can I use `peer channel fetch config` with only orderer nodes, no peer nodes?
body: <p>I've brought up an etcdraft based orderer cluster with 3 nodes and no peer nodes are deployed for now. And now I want to modify the orderer cluster like removing or adding members. Instructions I've found require firstly fetching the current config with the 'peer channel fetch config' command. </p>
  
  <p>My question is how I can do to fetch the current system channel config with 'peer channel fetch config' command before/without any peer up and running, or is there any other way to achieve this.</p>
  
  <ul>
  <li>fabric version: 1.4.4</li>
  </ul>