docs/data/reusables/webhooks/create_properties.md

Key	Type	Description
ref	string	The git ref resource, or null if ref_type is repository.
ref_type	string	The type of Git ref object created in the repository. Can be either branch, tag, or repository.
master_branch	string	The name of the repository's default branch (usually main).
description	string	The repository's current description.
pusher_type	string	Can be either user or a deploy key.