git: fatal: Could not read from remote repository

Your ssh key most likely had been removed from ssh agent

ssh-add ~/.ssh/id_rsa

where id_rsa is a ssh key associated with git repo

Update

You may get Could not open a connection to your authentication agent. error to resolve that you need to start the agent first by:

eval `ssh-agent -s`

I was facing same issue a while ago...

my .git/config had

url = [email protected]:manishnakar/polymer-demo.git

I replaced it with

url = https://github.com/manishnakar/polymer-demo.git 

and it works now:)

You can specify the username that SSH should send to the remote system as part of your remote's URL. Put the username, followed by an @, before the remote hostname.

git remote set-url website abc@***.com:path/to/repo