Feature request: Allow to update commit ID in messages when rebasing

The feature I'm asking is to add an extra-step during rebasing, checking whether there's a reference to a commit that's not going to be included in history and asks the user whether the heuristics is correct and if she wants to update those references.

Scenario: it can happen for a commit message to contain the ID of an
ancestor commit. A typical example is a commit with the message
"revert 01a9fe8". If 01a9fe8 and the commit that reverts it are
involved in a rebase the message "revert 01a9fe8" is no longer valid
-- the old 01a9fe8 has now a different hash. This will most likely be
ignored by the person who's rebasing but will let the other people
reading history confused.

Giuseppe