MarsSeed [1] filed a deletion request for sysvinit-git [2]: Abandoned; unmaintained since 2021. The source repo on savannah.nongnu.org has been discontinued since 2023; the currently active upstream is hosted on GitHub.
In any case, this package would not be compatible with the Arch Linux of today, only with some of the wholly different, ground-up reconfigured and recompiled systemd-less Arch Linux spinoffs. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/sysvinit-git/