git clone through ssh returns Permission denied (publickey,password)

Question

I have production_server and git_repo_server, git_repo_server .ssh/authorized keys have production user id_rsa.pub. When I ssh to production_server and make git clone - it works fine, don't ask any password. When I try to clone git repo to production_server on my local mashine using ssh I see:

Permission denied, please try again.
Permission denied (publickey,password).

It looks like ssh should be configured to send commands to remote server. But I don't know how to do it. Thanks for any help!

Solution

Problem was fixed. I added

Host * 
    ForwardAgent yes

to /etc/ssh/ssh_config

See ssh-agent tutorial