We use OneFlow + GitHub Forks.
This means:
feature/foobar)you_fork:feature/foobar to merge into the main branch (in the “Draft” state):
you_fork:feature/foobar → upstream:mainVideo explanation (14m) about how to work with GitHub forks.

Short answer:

Branch list is a shared resource that gets overused quickly (think “tragedy of the commons”). Forks make that resource private instead, thus saving everyone’s nerves.
OneFlow is a simplified version of the GitFlow/GitHubFlow branching model. Here it is: