Bi-directional mirroring enables situations where branches me being modified on two different remotes. In some instances the branch can be fast forwarded. When this is not possible `git` can frequently automatically merge commit the changes and create a merge commit. We should give users the ability to enable automatic merges when fast forward fails. ### Proposal - Add a new check box when bi-directional mirroring is enabled to allow merge commits This depends on an improved interface, rather than simply enabling push/pull simultaneously on the same target. ### Links / references - #3745 ### Documentation blurb #### Overview What is it? Why should someone use this feature? What is the underlying (business) problem? How do you use this feature? #### Use cases Who is this for? Provide one or more use cases. ### Feature checklist Make sure these are completed before closing the issue, with a link to the relevant commit. - [ ] [Feature assurance](https://about.gitlab.com/handbook/product/#feature-assurance) - [ ] Documentation - [ ] Added to [features.yml](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/features.yml)