a821 [1] filed a deletion request for netvirt-agent-git [2]:

Flag message and last comment from maintainer in 2020 say that this
service is dead. Upstream's homepage is 404. The PKGBUILD is in bad
shape (notably uses sudo in package()). Better delete.

[1] https://aur.archlinux.org/account/a821/
[2] https://aur.archlinux.org/pkgbase/netvirt-agent-git/