Define /commits/ behaviour

The URL /commits/ (e.g. https://gitlab.com/gitlab-org/gitlab-ce/commits/) is a 404. I think this URL must exist, maybe redirecting to /commits/<my default branch>/. The 404 is weird and I hit it all the time when I type it instead of click through gitlab interface.

Github behaviour is showing the default branch commits, without redirect. Bitbucket show commits in all branches.