MarsSeed [1] filed a deletion request for htop-temperature-git [2]:

Orphaned VCS package, last updated in 2018. Contains a small patch on top of the then-current version if htop (upstream version available in [extra]).

The patch has not been kept up-to-date so it is incompatible with the current git version of the code.

Also the git repository has moved to a different URL.

Anyway, now this package is obsolete. Arch has [extra] htop; AUR has htop-git package so there is no need for this one.

[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/htop-temperature-git/