gistfile1.txt

$ git push origin master
ssh_exchange_identification: Connection closed by remote host
fatal: The remote end hung up unexpectedly
$ git push origin master
ssh_exchange_identification: Connection closed by remote host
fatal: The remote end hung up unexpectedly
$ git push origin master
ssh_exchange_identification: Connection closed by remote host
fatal: The remote end hung up unexpectedly
$ git push origin       
Everything up-to-date
$ git push origin master
Everything up-to-date
$ git push origin master
Everything up-to-date
$ git push origin master
Everything up-to-date
$ git push origin master
ssh_exchange_identification: Connection closed by remote host
fatal: The remote end hung up unexpectedly
$ git push origin master
ssh_exchange_identification: Connection closed by remote host
fatal: The remote end hung up unexpectedly
$ git push origin master
Everything up-to-date
$ git push origin master
Everything up-to-date
$ git push origin master
Everything up-to-date
$ git push origin master
Everything up-to-date
$ git push origin master
Permission denied (publickey).
fatal: The remote end hung up unexpectedly
$ git push origin master
Everything up-to-date