Between a) using my own machine, b) using a company machine and c) firing the client, option B is pretty sensible. Option C is for when the client won't comprom

Between a) using my own machine, b) using a company machine and c) firing the client, option B is pretty sensible. Option C is for when the client won't compromise at all. You can always make separate github accounts, SSH keys, and so on, specifically for the job.