[satyanash]

use git notes for attaching information to important commits, after the fact, without altering their SHA

[mbakke]

How do you share notes with other users?

[yawaramin]

Notes are just objects stored in the git repo. They are distributed along with all the other objects.

[mbakke]

You had me worried there for a bit, but notes are not distributed by default.

For the curious, you can push/fetch

  refs/notes/*

...to share notes.