I want to fork namecoin/namecoin, but I've already forked bitcoin/bitcoin. The latter is the upstream parent of the former. The forkchain is:
bitcoin/bitcoin -> vinced/namecoin -> namecoin/namecoin
When I fork namecoin/namecoin, Github just redirects me to my myuserid/bitcoin fork, instead of creating a new myuserid/namecoin fork. It appears to Github that they are the same project, but they are not.
Anyone know how to do this?