Permission denied (publickey).
fatal: The remote end hung up unexpectedly
Copy this and add to your Git settings in github account
if $HOME/.ssh/id_rsa.pub not exists
cd ~/.ssh && ssh-keygen cat id_rsa.pub
All you’re set to go.
if you found any Warning: Permanently added ‘github.azc...com,220.127.116.11′ (RSA) to the list of known hosts.
ssh-keygen -R <hostname>