Удаленное происхождение уже существует
git remote remove origin
Mysterious Mandrill
git remote remove origin
git remote rm origin
git remote add origin git@github.com:username/myapp.git
git remote set-url origin https://github.com/your/repositorygit remote remove origin
#solved$ git remote set-url origin git@github.com:ppreyer/first_app.git
$ git remote set-url origin git@github.com:ppreyer/first_app.git