I'm on Ubuntu 13.10 and git recently started acting weird. Whenever I click or click, it takes about 20 seconds between the start of the command and the delay with the password request.
My remote url looks like username @ git.myserver.com:/project/directory/
The problem has only recently begun. I do not use the default git user, but the user created on the server and added to the git group.
The repo is not so great, and since there is a delay between running the command and asking for the password, I guess its network problem. The server is running on my local network, so connection speed should not be a problem.
Any suggestions?
Edit: here is a screenshot. Delay of 20 s is between "git pull" and "Enter Password" 
FIXED . According to the accepted answer, it was GSSAPIAuthentication. I just created the ~ / .ssh / config file and added:
Host * GSSAPIAuthentication no
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