Fix preval cache issues

webpack/loaders/git-loader.js

@@ -0,0 +1,8 @@
+const { resolve } = require('path');
+
+// Forces recompile whenever the current commit changes
+// Useful for generating the version hash in the UI
+module.exports = function(source, map) {
+  this.addDependency(resolve(__dirname, '../../.git/logs/HEAD'));
+  this.callback(null, source, map);
+};