It is easier than you think
Sample
sudo pacman -Syu python-feedparser
create a python file e.g.
~/kernel-org-parser.py
With content
#!/usr/bin/python
import feedparser
d = feedparser.parse('https://kernel.org/feeds/kdist.xml')
for f in d['entries']:
print(f['title'])
Run it
$ python ~/kernel-org-parser.py
6.3: mainline
6.3.1: stable
6.2.14: stable
6.1.27: longterm
5.15.110: longterm
5.10.179: longterm
5.4.242: longterm
4.19.282: longterm
4.14.314: longterm
next-20230505: linux-next