Create and check watch file
If the project is from a git repository use the following lines in watch file
version=3 opts=filenamemangle=s/.+\/v?(\d\S*)\.tar\.gz/php-mf2-$1\.tar\.gz/ \ https://github.com/indieweb/php-mf2/releases .*/v?(\d\S*)\.tar\.gz
Test the lines
use the command
uscan --verbose in the project directory were debian directory resides it will check the links and report back if it works.
Use this command to test the download
uscan --download --download-current-version