git: make the gpristine alias remove untracked git repos (#8697)

plugins/git/README.md

@@ -45,7 +45,7 @@ plugins=(... git)
 | gcf                  | git config --list                                                                                                                |
 | gcl                  | git clone --recurse-submodules                                                                                                   |
 | gclean               | git clean -id                                                                                                                    |
-| gpristine            | git reset --hard && git clean -dfx                                                                                               |
+| gpristine            | git reset --hard && git clean -dffx                                                                                              |
 | gcm                  | git checkout master                                                                                                              |
 | gcd                  | git checkout develop                                                                                                             |
 | gcmsg                | git commit -m                                                                                                                    |

plugins/git/git.plugin.zsh

@@ -66,7 +66,7 @@ alias gcb='git checkout -b'
 alias gcf='git config --list'
 alias gcl='git clone --recurse-submodules'
 alias gclean='git clean -id'
-alias gpristine='git reset --hard && git clean -dfx'
+alias gpristine='git reset --hard && git clean -dffx'
 alias gcm='git checkout master'
 alias gcd='git checkout develop'
 alias gcmsg='git commit -m'