Github with Multiple Computers

This might be a silly mistake but I started a github project through unreal on one of my computers and then went to my other computer and cloned the repo to my local computer and then opened it in Unreal. I cloned it from one of the collaborator accounts , not the owner of the github project or the other computer git account. Once it was open in Unreal I tried to activate source control but it says I must initialize the git project first. When I was doing this on the other computer on the same source control menu where I specify the git path there was a initialize git project button but here it is missing. What am I supposed to do to start using Git on on the second computer?