async Task CloneWord2VecNetRepo(string outputDir, ITestOutputHelper output)
{
// If the repo already exists, we delete it and extract it again.
string word2VecNetRepoRootDir = GetWord2VecNetRepoRootDir(outputDir);
FileTasks.DeleteDirectory(word2VecNetRepoRootDir, output);
await GitTasks.Clone(Word2VecNetRepoUrl, word2VecNetRepoRootDir, output);
await GitTasks.Checkout(Word2VecNetCommitSha1Id, output, word2VecNetRepoRootDir);
}