Git sideband hook output

Prior to 6d525d where Shawn made the receive-pack process send hook
output over side band #2, how did the hook output get sent to the
client?  On older clients (before this commit) and on older servers,
the hook output just shows up without the 'remote:' prefix.  After
this commit I get the 'remote:' prefix, which is kind of annoying.  Is
there a way to suppress this to get the old output format?  Or a
recommended way of patching the client/server in future versions to
get the old format back?

Thanks,
Scott