How to make git work via key?

Question

git

On the git server, cloned the repository from bitbucket via https. Each time you access bitbucket, you need to enter a password. I decided to connect an ssh key, generated it, added the public one in the settings on the bitbucket, the private one is on the server.
How can I make an existing repository authenticate using this key? The manuals show how to specify the key when cloning a new repository, but I did not find it for an existing one.
Thank you.

Answer 1

change the address of the repack in .git/config .

Answer 2

authorization by key - via ssh. through all sorts of smart-s and http - only login / password