build.bat: Use better submodule cleanup code

build.bat

@@ -226,21 +226,9 @@ rem ------------------------------------------------------------
 rem ------------------------------------------------------------
 
 :repairSubModules
-rem !!FIXME!! Implement parsing of submodules list and fill this array automatically
-rem NOTE: Don't use "git submodule foreach" because broken submodule will not shown in it's list!
-set SUBMODULES=_Libs\FreeImage
-set SUBMODULES=%SUBMODULES% _Libs\sqlite3
-set SUBMODULES=%SUBMODULES% _Libs\AudioCodecs
-set SUBMODULES=%SUBMODULES% _Libs\SDL_Mixer_X
-set SUBMODULES=%SUBMODULES% _common\PGE_File_Formats
-set SUBMODULES=%SUBMODULES% _common\PgeGameSave\submodule
-set SUBMODULES=%SUBMODULES% Content\help
-rem \===============================================================================
-for %%s in (%SUBMODULES%) do (
-echo Remove folder %%s ...
-if exist %%s\nul rd /Q /S %%s
-)
-echo Fetching new submodules...
+echo === Cleaning-up old state...
+git submodule foreach 'pwd; rm -Rf * .git*;'
+echo === Fetching new submodules...
 git submodule init
 git submodule update
 echo.