Matthew Lundin <mdl@imapmail.org> writes:

> That said, I think it would be nice to be able to create links to
> particular git commits.

Yes, I think that's 80% of the benefit of this idea for 20% of the
work.   It might be generalizable to, to say when creating a file link
that if the file is under version control, to have a simple link syntax
for specifying a revision, and make it simple to specify the revision
that was active when the link was made.