[Zambyte]

Others have explained the change IDs already in detail, but I want to try to give a short and sweet explanation: changes in Jujutsu are a mutable, high level abstraction built on gits immutable commits. Change IDs are stable across mutations.

[roland35]

Sounds like how Mercurial handles commits!

[Zambyte]

The people who work on Jujutsu explicitly draw a lot of inspiration from Mercurial :)