Get repo default branch

Hi,
Is it possible to get the repo's default branch with sql query？

In this script, it only list the protect branch info, but there is no default branch information.
sql/audit/repos-audit.sql

Anybody know which table store the default branch data ?

Thanks

Start with sql/audit/repos-audit.sql and trace the tables and fields used for protected-branch information. Determine whether the repository default branch is available through the same queryable data, then update the audit script only if the required source is identified and verify that its output includes the default branch.

Written by the indexing model from the issue text.