Managing Git access to your organization's repositories
You can add an SSH certificate authority (CA) to your organization and allow members to access the organization's repositories over Git using keys signed by the SSH CA.
Support for SSH certificate authorities is available with GitHub Enterprise Cloud and GitHub Enterprise Server 2.18+. For more information, see "GitHub's products."
About SSH certificate authorities
With an SSH certificate authority, your organization or enterprise account can provide SSH certificates that members can use to access your resources with Git.
Managing your organization's SSH certificate authorities
You can add or delete SSH certificate authorities from your organization.