Bug 31964 - Allow filter by path on CodeRevisionTagView
Doesn't work through UI (ie selecting path, and pressing go), but will work as Special:CodeReview/MediaWiki/tag/foobar?path=/trunk
Didn't see much point (at the moment at least) feeding that in, but if needed, I can. Won't change the previous behaviour where if you had it filtered by tag, entering a path just ignores the tag anyway