Create a tracking branch off of a remote branch in git

git branch --track branchName origin/branchName
git checkout branchName

Resolve "Agent admitted failure to sign using the key."

You might be getting the following error message, perhaps when either using ssh or git:


Agent admitted failure to sign using the key.
Permission denied (publickey).
fatal: The remote end hung up unexpectedly

Solve this by this simple fix:

ssh-add

What may have happened, is that you changed your ssh key, and something got confused.