Re: The current rules for making Emacs binaries available on the net?

[Richard Stallman]

          Yes. Section 6(d) allows this. However, you must
          provide clear instructions people can follow to obtain
          the source, and you must take care to make sure that
          the source remains available for as long as you
          distribute the object code.

    Now if someone distributes unpatched binaries built from Emacs sources
    is it then enough to tell from where this sources can be downloaded
    and what revision number the checkout had?

That would satisfy the first clause.  There is also the second clause:
you must take care to make sure that the source remains available for
as long as you distribute the object code.