I've previously forked jockm/vert.x and sent him a pull request. Now I want to fork vert-x/vert.x (the upstream of jockm/vert.x) and send them a different pull request. But when I click the Fork button, unsuprisingly I end up in my tjcrowder/vert.x fork of jockm/vert.x instead. Is it possible to fork both vert-x/vert.x and jockm/vert.x simultaneously such that I can send each pull requests as appropriate?
I fear the answer may be the same as for this question about the converse situation ("there's no GitHub way, but you can add a remote repo") but I'm hoping otherwise — not least because I don't see how the answer there would allow me to send pull requests to the new remote.