I'd like to modify the URL of a site by doing a get, the URL of a site is defined in:
_admin, sites, configuration, Site URL

My goal is to create a script to copy a production repository to a test repository. At that time afetr the copy I need to update the URL of the site manually.
I'd like to modify it by doing a get so I would be able to add that in my script.
The get should contains the id of the site and the URL. It may be nice to add some security, may be by checking th IP.

In this way we would be able to deploy every night on a test environment the contents of the production environment. We would gain time.