First add them:
git remote add origin git remote add herkou git@heroku.com:.git
In case if you want to clone and add
git clone https://github.com//.git git remote add origin https://github.com//.git
Push and Pull in Github
git remote -v git pull origin master -- pull from Github Master branch git push origin master -- push to Github Master branch
Pushing to Heroku
git remote add origin git remote add herkou git@heroku.com:.git git push heroku master -- push to Heroku