how to start a fork at repo.or.cz?

[Mark Polesky]

So, I'm trying to start a fork at
http://repo.or.cz/w/lilypond/mpolesky.git, but I get:

$ git push --dry-run
address@hidden's password:
[3 attempts here, then...]
Permission denied (publickey,password).
fatal: The remote end hung up unexpectedly

I don't know which password it's asking for, and none of
these work:
* my SSH passphrase for pushing
* my admin password at repo.or.cz
* just pressing <ENTER>

I have...

1. registered my public key at http://repo.or.cz/reguser.cgi

2. added myself as a user:
   http://repo.or.cz/editproj.cgi?name=lilypond/mpolesky.git

3. added these lines to .git/config:
   [remote "mpolesky"]
           url = ssh://repo.or.cz/srv/git/lilypond/mpolesky.git
           fetch = +refs/heads/*:refs/remotes/mpolesky/*
   [branch "pictograms"]
           remote = mpolesky

4. $ git checkout pictograms
   $ git push --dry-run

And that's where I get the above password request.  I'm
assuming I'm missing something obvious, like doing an
initial clone, which I've not done, because I don't know
how!

Should be pretty simple; can someone point me in the right
direction?

Thanks.
- Mark