'git remote set-head' <name> [-a | -d | <branch>]
'git remote show' [-n] <name>
'git remote prune' [-n | --dry-run] <name>
-'git remote update' [group]
+'git remote update' [-p | --prune] [group | remote]...
DESCRIPTION
-----------
remotes.default is not defined, all remotes which do not have the
configuration parameter remote.<name>.skipDefaultUpdate set to true will
be updated. (See linkgit:git-config[1]).
++
+With `--prune` option, prune all the remotes that are updated.
DISCUSSION