If you have administrative access, you can convert your public repositories to private ones.

Warning: When a public repository is made private, public forks of the public repository are detached and put into a new network. They are not made private. For more information, see "What happens to forks when a repository is deleted or changes visibility".

  1. On GitHub Enterprise, navigate to the main page of the repository.

  2. Repository settings buttonIn the repository's right sidebar, click Settings.

  3. Make Private buttonClick Make private.

  4. Warnings popupRead the warnings.
  5. Type the name of the repository that you want to make private.
  6. Warning PopupClick I understand, make this repository private.