Where is genesis block stored and how can I retrieve it from an existing network (Hyperledger Fabric)?

I would like to retrieve the genesis block from an existing Hyperledger Fabric network.
I found this method

docker cp peer0.org1.example.com:channelall.block .

Now, where exactly is genesis block stored, what is the path to it?
Also, what if the network is stopped, so docker containers are not running, how do I find it then?

Source: Docker Questions