man page for "git remote set-url" seems confusing/contradictory

["Robert P. J. Day" <rpjday@crashcourse.ca>]

  never had cause to examine "git remote set-url" before so i'm a bit
puzzled by this part of the man page:

  set-url

  Changes URLs for the remote. Sets first URL for remote
  <name> that matches regex <oldurl> ...

  With --push, push URLs are manipulated instead of fetch URLs.
 .. snip ...

  Note that the push URL and the fetch URL, even though they can be
  set differently, must still refer to the same place. What you pushed to
  the push URL should be what you would see if you immediately fetched
  from the fetch URL. If you are trying to fetch from one place (e.g.
  your upstream) and push to another (e.g. your publishing
  repository), use two separate remotes.

i don't understand how you can clearly set the fetch and push URLs of
a remote independently, while the man page nonetheless insists that
"even though they can be set differently, must still refer to the same
place". how can they be set differently yet still must refer to the
same place?

  i suspect i'll have a couple more questions related to this shortly
after i do a bit more reading.

rday