jamincollins [1] filed a deletion request for ceph-git [2]:

The package is woefully out of date (it was last updated 2015-06-09 18:38). The maintainer has stated "Don't have time to maintain this package anymore. If anyone else wants to take it over, feel free.". The non-git version of this package is far more current.

[1] https://aur.archlinux.org/account/jamincollins/ [2] https://aur.archlinux.org/pkgbase/ceph-git/