### Description When I am in a discussion in the middle of the merge request page, sometimes I want to remember what is the current source branch to clone it to my PC, then I have to go to the top of the page to see the following info (and then I loose the focus on the discussion):  ### Proposal It would help a lot to show this information all the time, for example in the right sidebar (which has space to fit it)  ### 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)