A #branch: reference in a body stays plain text in the TUI. Memo, tag and commit references open. The Repository view shows the posts of a repository, not the commits of a branch, so no view can be the target yet. The Branches view and the branch param of #commit:3a7c9fd84161@gitmsg/pm give the target: a #branch: reference opens the Repository view on that branch. Remainder of #commit:53991b82d95f@gitmsg/pm.