Add .git folders to Polymod ignore list.

source/funkin/modding/PolymodHandler.hx

@@ -151,7 +151,7 @@ class PolymodHandler
         frameworkParams: buildFrameworkParams(),
 
         // List of filenames to ignore in mods. Use the default list to ignore the metadata file, etc.
-        ignoredFiles: Polymod.getDefaultIgnoreList(),
+        ignoredFiles: buildIgnoreList(),
 
         // Parsing rules for various data formats.
         parseRules: buildParseRules(),
@@ -333,6 +333,21 @@ class PolymodHandler
     }
   }
 
+  /**
+   * Build a list of file paths that will be ignored in mods.
+   */
+  static function buildIgnoreList():Array<String>
+  {
+    var result = Polymod.getDefaultIgnoreList();
+
+    result.push('.git');
+    result.push('.gitignore');
+    result.push('.gitattributes');
+    result.push('README.md');
+
+    return result;
+  }
+
   static function buildParseRules():polymod.format.ParseRules
   {
     var output:polymod.format.ParseRules = polymod.format.ParseRules.getDefault();