It is rather annoying that on pages like https://phabricator.wikimedia.org/rMW5e396d428332e8316036158ee0bf411e2e815f82 not once anywhere on the page or in the url does it contain a plain commit hash.
The internal identifier is a superset of the commit hash but that is not human-readable or easily selectable. Having urls contain a slash like /r/MW/:hash or diffusion/MW/commit/:hash would make this easier. Or by at least mentioning it somewhere on the page.
As a user I want to be able to easily select the hash and use it elsewhere (either for performing actions via Git directly, or when using other git viewers and mirrors).