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.
What worked for me:
My repo was a fork and still linked to the the parents repo.
git remote -v
Will tell you if it is your repo or not.
git remote set-url origin https://github.com/USERNAME/OTHERREPOSITORY.git
Allows you to reconfigure it to your repo and then allow you to push.