git init
git remote add origin https://github.com/main/main.git
git remote add droplet_1 https://github.com/droplet1/droplet1.git
git remote add droplet_2 https://github.com/droplet2/droplet2.git
...
git remote add droplet_n https://github.com/dropletn/dropletn.git
git fetch origin
git fetch droplet_1
...
git fetch droplet_n