Git's patching functionality is pretty awful in actual practice. For example, try building a git patch that applies a standard set of patches between two divergent (vendored) kernel trees. It's usually a mess.

It's also pretty easy to find a set of patches that have to be applied in order. Then someone copies those patches onto another divergent tree, which has it's own set of custom patches without renaming. This is dangerous in git and probably sensible in pijul.

Haven't use pijul in practice, but it's not hard to imagine being better than git here.