GIT_SSH_COMMAND="ssh -vvv"(2)

debug3: receive packet: type 80
debug1: client_input_global_request: rtype keepalive@openssh.com want_reply 1
debug3: send packet: type 82
debug3: send packet: type 1
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
  #0 client-session (t4 r43 i0/0 o0/0 fd 5/6 cc -1)

debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
Connection to github.com closed by remote host.
Transferred: sent 3460, received 2308 bytes, in 780.3 seconds
Bytes per second: sent 4.4, received 3.0
debug1: Exit status -1
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.