I want to clone a repository usingRepo.clone_from() with a specific SSH key. This appears to be possible by settingGIT_SSH usingcustom_environment() on aGit instance. However,clone_from() appears to be creating its ownGit instance so I am not able to create a custom environment in this case. Would I have to reimplementclone_from() to use a custom environment? Or is there some other way of working around this limitation that I am missing?