SCM access is now configured on forge-allura.apache.org, and you can fork the Allura repository there and submit merge requests.
The instruction box on the repo browse page (e.g., https://forge-allura.apache.org/p/allura/git/) and merge request instructions will display the correct URL for each repository, but it should be noted that forks (and other repos created through Allura) will use URLs of the form https://forge-allura.apache.org/git/u/<username>/<fork-name> while the Allura repo will use the canonical repository at https://git-wip-us.apache.org/repos/asf/allura.git. You will also need to use your Allura username when authenticating for the fork, and your Apache username / password when authenticating for the canonical Allura repo. (Hopefully, we'll get the auth better integrated before too long.)
