I was in branch feature_swap there I did some change but I am not confident enough to push those changes in feature_swap branch. So I tried to create another sub branch feature_swap_experiment with 
git branch feature_swap_experiment
git checkout feature_swap_experiment
Now I want to push to feature_swap_experiment I've tried git push origin feature_swap_experiment which is not working
error: src refspec feature_swap_experiment does not match any.
error: failed to push some refs to 'https://uname@bitbucket.org/uname/project.git'
 
     
    