Git push heroku master does nothing

I am on windows 7.

I followed the documentation on heroku there: https://devcenter.heroku.com/articles/nodejs

when I execute

git push heroku master

it does absolutely nothing and I get no error. I tried to re-generate my ssh key, to delete everything and do it again. Always the same.

Sorry for providing so few info but as I have no error message, it is really difficult for me to figure out...

Ok. SSH Key problem. So if you have no error message on window, try to re-created manually your ssh key following this instruction and it will work. Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly

If anyone else has this problem, my issue was that I was not pushing from my local master branch to heroku/master. You have to either push from your local master branch to heroku/master of run the command

git push heroku yourbranch:master

This is from the heroku documentation here