Reproduction Steps:

1. rm -rf ~/.config/fish; rm -rf ~/.local/share/fish
2. fish
3. git --<tab>

Expected behavior:

All of the options to git should be suggested:

git --help
usage: git [--version] [--help] [-C <path>] [-c name=value]
           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
           [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]
           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
           <command> [<args>]

Observed behavior:

Autocompletion to --help

Additional information:

fish_update_completions doesn't help.

Fish version: 2.3.0

Operating system: Arch Linux

Terminal or terminal emulator: urxvt