An organization owner must allow forks of private and internal repositories on the organization level before you can allow or disallow forks for a specific repository. For more information, see "Managing the forking policy for your organization."
- En tu instancia de GitHub Enterprise Server, visita la página principal del repositorio.
 - Debajo de tu nombre de repositorio, da clic en  Configuración. 

 - Under "Features", select Allow forking.
