I have to send a lot of pull requests, so I would rather use the bash command line than bitbucket\'s web interface.
Usage example: $ git-req username
$ git-req username
I wasn't too satisfied with the answers in this thread, so I created an package for it:
https://www.npmjs.com/package/bitbucket-pr
Instructions:
npm i -g bitbucket-pr
... Go to folder where you want to create a pull request ...
bitbucket-pr