1. A system for efficient repository migration and storage, comprising: an interface to: receive an indication to migrate a repository from a standard repository system in which a standard repository data is replicated in multiple repositories to an efficient repository system in which related repositories are grouped together as a network of repositories and an efficient repository data is stored in a shared network repository; and a processor to: determine a destination repository for the repository to be migrated; hardlink copy the repository to be migrated into the destination repository; determine whether the repository belongs to a network of repositories, comprising to: determine whether the repository is a fork of another repository in the network of repositories; and in response to a determination that the repository is the fork of the other repository in the network of repositories, determine that the repository belongs to the network of repositories; in the event that the repository belongs to a network of repositories: determine whether a shared network repository needs to be created, comprising to: determine whether a number of forks of the network of repositories is greater than one; and in response to a determination that the number of forks of the network of repositories is not greater than one, determine that the shared network repository needs to be created; in the event that the shared network repository needs to be created, create the shared network repository; and configure the destination repository to share objects stored in the shared network repository.