Comment by simonw

I hadn't heard of Pijul. My first search took me to https://github.com/8l/pijul which hasn't been updated in 11 years, but it turns out that's misleading and the official repo at https://nest.pijul.com/pijul/pijul had a commit last month.

... and of course it is, because Pijul uses Pijul for development, not Git and GitHub!