error: unknown switch `X'
usage: git fetch [<options>] [<repository> [<refspec>...]]
or: git fetch [<options>] <group>
or: git fetch --multiple [<options>] [(<repository> | <group>)...]
or: git fetch --all [<options>]
-v, --verbose be more verbose
-q, --quiet be more quiet
--all fetch from all remotes
-a, --append append to .git/FETCH_HEAD instead of overwriting
--upload-pack <path> path to upload pack on remote end
-f, --force force overwrite of local branch