Read permission for all forks

Hello,
I have a organization with a repository named “flucky”. The repository is private.

Members of the group “flucky_member” have read permission on the repository. They all make a fork from flucky, but every member of the group can not read the repository from the other team members till they set read permissions in her own forked repository.

How can I enable automatically read permissions on forks for all members of the group?