git push heroku remote end hung up unexpectedly

I had a public key established with Heroku, but git push kept failing.

Finally found this answer on StackOverflow: http://stackoverflow.com/questions/4269922/permission-denied-publickey-when-deploying-heroku-code-fatal-the-remote-end

The solution was to modify the ~/.ssh/config file

This problem was messing with me for a few days.

This this might help.

1) Find out what keys you have in Heroku now.

$ heroku keys
=== 1 key for joe@example.com
ssh-dss AAAAB8NzaC...DVj3R4Ww== joe@workstation.local

2) Build a ~/.ssh/config file:

$ sudo vim ~/.ssh/config

Edit with this info

Host heroku.com
Hostname heroku.com 
Port 22 
IdentitiesOnly yes 
IdentityFile ~/.ssh/ssh-dss # location and name of your private key
TCPKeepAlive yes 
User joe@workstation.local