This may or may not be related to the same issue I was having. When I did verbose output on my SSH command to fetch, the call failed on
Repository not found.
debug1: Authentication succeeded (publickey).
Authenticated to github.com ([184.108.40.206]:22).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: pledge: network
debug1: Sending environment.
debug1: Sending env LANG = C.UTF-8
debug1: Sending command: git-upload-pack 'myOrgName/myRepoName.git'
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
ERROR: Repository not found.
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
Transferred: sent 2700, received 2404 bytes, in 0.1 seconds
Bytes per second: sent 20739.7, received 18466.0
debug1: Exit status 1
fatal: Could not read from remote repository.