newapkbuild: fails creating package with new github source url

I tried creating package with url: https://github.com/open-iscsi/tcmu-runner/archive/refs/tags/v1.5.4.tar.gz
It generated invalid source url and wget failed with 404 - log (newapkbuild with set -x): https://katb.in/fur2898
When someone on IRC told me to try this url: https://github.com/open-iscsi/tcmu-runner/archive/v1.5.4.tar.gz it worked.

This should be fixed or at least mentioned in docs/wiki/man.