User blog comment:Rappy 4187/Technical Update: September 23, 2015/@comment-24473195-20150923203110/@comment-24473195-20150924083038

Well, for a largely opensource project links to merges are something nice to have. I've seen it in some wikimedia projects and it really seems to highlight the background to a particular issue/feature/development, e.g. (https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News/2015/39). In some cases it makes it easy to evaluate how old or problematic a bug is without asking staff, or how a feature may cause problems than it solves.

I know phabricator is far better suited for those purposes as a project management software although not applicable or appropriate to wikia as a commercial entity, but github is a close enough substitute.