The Sites and Account Settings for Admins article has the most up-to-date information on this topic.
A Site's settings can now be copied to create another site with the same settings, including permissions, customized checks, and site exclusions.
In the Settings area under Sites, there is now a vertical dots column for each site next to the Dashbord button.
This column provides additional options, including Copy Settings - which is the ability to copy a site's settings.
This will copy the Site's settings, including users/groups, paths to ignore, the type of checks to perform, and crawl options, etc. But it won't copy other content from the site, including pages and reports (you will need to run a crawl on the new site in order to generate page information).