Liquid supposedly supports hashing as a string filter. Does Jekyll? Putting this feature in Jekyll would help in a fair number of scenarios, specifically for people using Github Pages to distribute software, and it’d be a fairly useful cache buster for CSS/JS/etc. I’d imagine some people would argue about the performance overhead of allowing this functionality but since there are already execution limits in Github Pages as well as most CIs I don’t forsee it being much of an issue. Any chance it could happen?
You can try my Jekyll plugin for this very purpose: GitHub - yegor256/jekyll-git-hash: Jekyll Plugin for Git Hash Retrieval