MarsSeed [1] filed a deletion request for python-matrix-client-git [2]: Fails to build since at least 2023 (see AUR comment).
Upstream is EOL since 4 years ago [a], and they recommend matrix-nio instead (see README.rst). [a]: https://github.com/matrix-org/matrix-python-sdk [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python-matrix-client-git/
