FIX: Remote themes Github link should go to custom branch #9184

app/assets/javascripts/admin/controllers/admin-customize-themes-show.js

@@ -203,6 +203,17 @@ export default Controller.extend({
     );
   },
   sourceIsHttp: match("model.remote_theme.remote_url", /^http(s)?:\/\//),
+
+  @discourseComputed(
+    "model.remote_theme.remote_url",
+    "model.remote_theme.branch"
+  )
+  remoteThemeLink(remoteThemeUrl, remoteThemeBranch) {
+    return remoteThemeBranch
+      ? `${remoteThemeUrl.replace(/\.git$/, "")}/tree/${remoteThemeBranch}`
+      : remoteThemeUrl;
+  },
+
   actions: {
     updateToLatest() {
       this.set("updatingRemote", true);