Version 2.2 of the upstream tarball is available at:
https://github.com/OCSInventory-NG/OCSInventory-ocsreports/releases/download/2.2/OCSNG_UNIX_SERVER-2.2.tar.gz

However, the file is not a .gz file, it's just a regular tarball. This crashes
some Debian tool.

This is how you are create the ocsinventory-server_2.2+dfsg.orig.tar.gz :

	$ uscan --download-current-version --verbose --rename
	$ mv ../OCSNG_UNIX_SERVER-2.2.tar.gz ../OCSNG_UNIX_SERVER-2.2.tar
	$ gzip ../OCSNG_UNIX_SERVER-2.2.tar
	$ mk-origtargz --package ocsinventory-server --version 2.2 --repack-suffix +dfsg --rename --compression gzip --directory .. --copyright-file debian/copyright ../OCSNG_UNIX_SERVER-2.2.tar.gz
