I was able to clone a copy of this repo over HTTPS authenticated. I\'ve made some commits and want to push back out to the GitHub server. Using Cygwin on Windows 7 x64.
I had the same issue. My case was: I'd initialized git repo locally before I created it on github, then I tried to add remote branch. I solved my issue by changing the order of actions: created a repo on github site, then inited it locally. But it's not the case fr them who like to do all from command line as me.