Based on this tutorial I was able to successfully connect Github for Desktop with my remote Bitbucket repo.
Looking at the example tutorial repo I see there is an Pull Request option built in the application - great:
However the option is missing when I chose my remote Bitbucket repo:
I couldn't find any option that is reponsible for this.
Anyone knows what affects this behavior?
"Pull Request" is very much a GitHub feature, associated to GitHub repos.
So For BitBucket, the simplest approach is to push your feature branch to the remote repo (which is a BitBucket one, not a GitHub one), and make your PR from there (from the remote BitBucket web GUI, even within the same repo)
Once the PR is initiated, each push done from the GitHub Desktop will complete said PR.
In Bitbucket go to Settings -> Branch Permissions, and add a new branch permission with your name.
EDIT
来源:https://stackoverflow.com/questions/39525102/github-for-windows-pull-request-for-remote-bitbucket-repo