Function ostree_sys::ostree_mutable_tree_new_from_commit

pub unsafe extern "C" fn ostree_mutable_tree_new_from_commit(
    repo: *mut OstreeRepo, 
    rev: *const c_char, 
    error: *mut *mut GError
) -> *mut OstreeMutableTree

This is supported on crate feature v2021_5 only.