Initializes a git_submodule_update_options with default values. Equivalent to creating an instance with GIT_SUBMODULE_UPDATE_OPTIONS_INIT.
git_submodule_update_options
The git_submodule_update_options instance to initialize.
Version of struct; pass GIT_SUBMODULE_UPDATE_OPTIONS_VERSION
GIT_SUBMODULE_UPDATE_OPTIONS_VERSION
Zero on success; -1 on failure.