I want to allow:
git clone https://github.com/sahilsareen/LoveIsInTheAir.git
Which IP address obtained from https://api.github.com/meta should I whitelist?
You will need to whitelist the web IP addresses (which are the same as the git IP addresses). The API addresses are for accessinf api.github.com, the importer addresses are the addresses any github imports will connect from, this is not relevant for cloning.