Triggering a Harbourmaster build on a given commit

Hi, Given a concrete commit on a non-master branch (e.g. https://phabricator.haskell.org/rGHC20acaa7785d910d36d46c4eae9e9cce4000635d1), how do I manually trigger a Harbourmaster build + validation? Thanks, Gergo -- .--= ULLA! =-----------------. \ http://gergo.erdi.hu \ `---= gergo@erdi.hu =-------' A man's best friend is his dogma.