-------
-d::
Remove untracked directories in addition to untracked files.
+ If an untracked directory is managed by a different git
+ repository, it is not removed by default. Use -f option twice
+ if you really want to remove such a directory.
-f::
+--force::
If the git configuration specifies clean.requireForce as true,
'git-clean' will refuse to run unless given -f or -n.