That depends on what exactly you want to achieve. The scrpt's intended purpose is to make a backup of .deb files hosted on Nokia servers for fear of those servers going offline in an unspecified but possibly near future. For that purpose, you do not need to change anything at all.

Maemo.org repositories are not that likely to disappear any time soon so the backup is not that important. But if you want to backup Maemo repositories, all you need to change is nokia.com to maemo.org. Similarly, if you want to backup literally everything, skip the grep part altogether or simply replace nokia.com with *.