easy. 1) get a distro with 5 years support. 2) when it's out of date, buy a new $20/month vps, install git and ssh. Move your repo and turn off the old server

easy. 1) get a distro with 5 years support. 2) when it's out of date, buy a new $20/month vps, install git and ssh. Move your repo and turn off the old server. This might take 2 hours, every 5 years. Not a big deal.