This is a very specific workflow when using Gerrit Code Review. The commit can't be pushed directly to the origin branch (let's say origin/master) but to a staging branch (origin/refs/for/master) where the commit is validated through the interface and then merged in origin master.
Now in my git config for my repo I have the following:
Not sure about the terminology (maybe Branch custom action can do the trick) but yes what I'm trying to do is pushing a branch, not just a commit. Having the action appearing in the side bar or commit list is good.