[mythtv] How do I submit a fix?

[Steve E]

  Hi,

   I'm a potential first time contributor, but I need some help.

   I have a solution for a ticket which already exists.

http://code.mythtv.org/trac/ticket/10712

I've read and followed the instructions at

http://www.mythtv.org/wiki/Submitting_Bug_Fixes
http://code.mythtv.org/trac/
http://code.mythtv.org/trac/wiki/TicketHowTo
http://code.mythtv.org/trac/wiki/UsingGit

I've registered an account at github.com, and I've cloned the MythTV 
project.

This is the first time I've used Git, so I found a very helpful book to
provide some instructions.

http://git-scm.com/book

I've implemented the fix in my view. I've run 'git add' and 'git commit 
-v', but
now the Myth development documentation has left me hanging. What exactly
is the next step?

   The git-scm book talks about "pushing". The only reference I've found on
the Myth wiki pages says "git push -n should always verified before real 
pushing".
So I tried that, and it just fails saying "Permission to 
MythTV/mythtv.git denied".

   Elsewhere I've found some vague instructions to "attach a patch to a 
ticket",
but there is no explanation of the format of "a patch". Is this supposed 
to be
a diff listing on each file? Is this supposed to identify a git branch 
which is
publicly readable? How do I create that?

   Please provide me some guidance on how to proceed.

     Thanks,

     - Steve E