When gitlab says make a file executable what exactly do they mean?

Gitlab says "Make the hook file executable and make sure it's owned by git " , but I read here that a file can be executable by owner, group, world. So which one do they mean? Right now I am changing -rw-r--r-- 1 git git 0 Jun 24 00:32 pre-receive to -rwxr--r-- 1 git git 0 Jun 24 00:32 pre-receive Is this sufficient to just make it executable for the owner?