Repository administrators and organization owners can change several settings, including the names and ownership of a repository and the public or private visibility of a repository. They can also delete a repository.
About repository transfers
When you transfer a repository to a new owner, they can immediately administer the repository's contents, issues, pull requests, releases, and settings.
Transferring a repository owned by your personal account
You can transfer a repository owned by your personal user account to another user or to an organization where you have repository creation permissions.
Transferring a repository owned by your organization
You can transfer a repository owned by your organization to your personal user account or to another organization where you have repository creation permissions.
Renaming a repository
You can rename a repository if you're either an organization owner or have admin permissions for the repository.
Making a public repository private
If you have administrative access, you can convert your public repositories to private ones.
Making a private repository public
You can change a repository's visibility from private to public if you're either an organization owner or have admin permissions for the repository.
Deleting a repository
You can delete any repository or fork if you're either an organization owner or have admin permissions for the repository or fork. Deleting a forked repository does not delete the upstream repository.