gistfile1.txt

~ % echo $GIT_SSH
ssh -F /Users/guille/ssh_config

~ % cat ssh_config
# Key for guille
Host github-guille
  HostName github.com
  User git
  IdentityFile ~/.ssh/id_rsa

# Key for mario
Host github-mario
  HostName github.com
  User git
  IdentityFile ~/.ssh/id_rsa.mario

~ % ssh -F ssh_config git@github-mario
PTY allocation request failed on channel 0
ERROR: Hi mariotatis! You've successfully authenticated, but GitHub does not provide shell access
                                                                                                 Connection to github.com closed.

~ % ssh -F ssh_config git@github-guille
PTY allocation request failed on channel 0
ERROR: Hi guilleiguaran! You've successfully authenticated, but GitHub does not provide shell access
                                                                                                    Connection to github.com closed.

~ % git clone git@github-mario:koombea/rhospike.git
Initialized empty Git repository in /Users/guille/rhospike/.git/
error: cannot run ssh -F /Users/guille/ssh_config: No such file or directory
fatal: unable to fork

~ % git clone git@github-mario:koombea/publisher.git
Initialized empty Git repository in /Users/guille/publisher/.git/
error: cannot run ssh -F /Users/guille/ssh_config: No such file or directory
fatal: unable to fork