install hub first with brew: brew install hub then use a simple command, like at the example below: hub pull-request -m "best pr ever" -b oozou:develop -h feature/awesome-improvements

or even smarter:

hub pull-request -m "best pr ever" -b oozou:develop -h $(git rev-parse --abbrev-ref HEAD)

for more detailed info how to make pull requests see at hub pull-request --help