If the 'GIT_DIR' environment variable is set then it specifies a path
to use instead of `./.git` for the base of the repository.
If the object storage directory is specified via the 'GIT_OBJECT_DIRECTORY'
environment variable then the sha1 directories are created underneath -
If the 'GIT_DIR' environment variable is set then it specifies a path
to use instead of `./.git` for the base of the repository.
If the object storage directory is specified via the 'GIT_OBJECT_DIRECTORY'
environment variable then the sha1 directories are created underneath -