For those familiar with Git terminology:
The simplest way to assemble a triangular workflow is to set the branch’s merge key to a different branch name, like so:
[branch “branch”] remote = origin merge = refs/heads/default
This will result in the branch pullRef as origin/default, but pushRef as origin/branch, as shown in Figure 9.
Working with triangular forks requires a bit more customization than triangular branches because we are dealing with multiple remotes. […]
How is that different from sending a PR?
For a single PR it’s pretty much the same, but if you have multiple back and forth, you’d have to set up multiple remotes and switch between them. Now you don’t. If I understand it correctly, you can now just “git pull” from repo1 and “git push” to repo2
Not oc, but thank you for explaining