If your already maked fork, then need update your repository from main repo.
Clone forked repository on your device.
You can use PHPStrom for clone:
Or use command in console: git clone link_to_forked_repository
Open cloned reposotory -> Update repository -> Make changes -> Commit -> Push. Note: For JS SDK, need commit to stable branch. And don't forget update `config` method for JS models in case when you add/delete/rename property or change @get/@post tags in documentation. You can link commit to existing review by adding “+ review WL-XXXXXX” to commit comment, or add commit to review in Fisheye after your pull request will be merged to main repository.
Open your repository on github.
Open pull request.
Create pull request. After your pull request will be merged to main repository, your commit will be accessible in Fisheye.