I have solved this question by myself.
Finally I found a great post with interesting topic.
Hi Im getting the error below:
git clone -b v0.7.x https://github.com/NodeBB/NodeBB.git
Cloning into 'NodeBB'...
fatal: Remote branch v0.7.x not found in upstream origin
Im really new into this whole thing and dont know what to do
It will be easier and faster to test it on OpenShift cloud.
You can also use NodeBB Docs articles.
Ignore the above advice. The branch name you entered doesn't exist. Remove -b v0.7.x and it will just install the latest. Replace v0.7.x with v0.6.x for the stable branch.