On Tue, Oct 23, 2012 at 10:47:28PM +0200, Thomas Gleixner wrote:

I agree that this is a common issue. Acked-by/Reviewed-by mails come
in after the fact that the patch has been committed to an immutable
(i.e no-rebase mode) branch or if the change in question already hit
Linus tree.

Still it would be nice to have a recording of that in the git tree
itself.

Something like: "git --attach SHA1 <comment>" would be appreciated!

It is spelled:

  git notes add -m <comment> SHA1

The resulting notes are stored in a separate revision-controlled branch
and can be pushed and pulled like regular refs. Note, though, that the
default refspecs do not yet include refs/notes, so you'd have to add
them manually. The workflows around notes are not very mature yet, so if
you start using them, feedback would be appreciated.

-Peff