As a site admin, is there a way to add yourself as an owner to all organizations in a GitHub Enterprise instance?

Using https://developer.github.com/v3/repos/#list-organization-repositories to return all repos from an org which I am not a member of return only its public repos. This request is authorized using a PAT with access to all scopes and belongs to my site admin LDAP user. I can see the org has many private repos, and I’d like to be able to return all repos of all orgs as part of a total GitHub audit initiative. The default reports you can generate in the admin console and UI are not sufficient because I need a programmable way to return the last activity (e.g. commit) date from every repo.