MarsSeed [1] filed a deletion request for matcher-git [2]: Does not do anything during runtime. Upstream not maintained since 2014, and repo got archived in 2018. [a]
I think it may no longer be useful to keep this developmental VCS package. [a]: https://github.com/burke/matcher [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/matcher-git/
