Gub upload failure

[Phil Holmes]

OK - so it looks like I've now rsynched a few 100 MB of updates.  I get this 
failure:

git --git-dir downloads/lilypond/git push 
ssh+git://address@hidden/srv/git/lilypond.git/ 
refs/tags/release/2.17.1-1:refs/tags/release/2.17.1-1
Permission denied (publickey).

I'm assuming that this is because GUB is trying to log in as you to the git 
repo and failing, because it has my key?  a) is that right?  b) should I 
find the address@hidden bit and change this to my git username and c) what 
does this command do?

--
Phil Holmes