Message 'src refspec master does not match any' when pushing commits in Git

Question

I clone my repository with:

git clone ssh://xxxxx/xx.git 

But after I change some files and add and commit them,

Answer 1

This happens too when you are in a specific branch and try to push another branch that does not exist yet, like:

$ git branch
* version-x  # you are in this branch
  version-y

$ git push -u origin master
error: src refspec master does not match any.
error: failed to push some refs to 'origin_address'