Zebradil [1] filed a deletion request for kapp-git [2]: There are kapp and kapp-bin packages. The tool is usually released shortly after new changes. I don't see a good reason to keep maintaining the git version of the package.
[1] https://aur.archlinux.org/account/Zebradil/ [2] https://aur.archlinux.org/pkgbase/kapp-git/
