sngn [1] filed an orphan request for s3backer-git [2]: Maintainer seems to be MIA. I contacted him via mail on Feb 19. Looking at other packages he maintains seems to confirm he is not doing anything anymore.
[1] https://aur.archlinux.org/account/sngn/ [2] https://aur.archlinux.org/pkgbase/s3backer-git/
