message: Also accept stderr as valid result.
diff: @@ -8,11 +8,11 @@ const debug = setupDebug('chromatic-cli:git');
  async function execGitCommand(command) {
  try {
  - const { stdout } = await execa.command(command, {
  + const { stderr, stdout } = await execa.command(command, {
  env: { LANG: 'C', LC_ALL: 'C' }, // make sure we're speaking English
  timeout: 10000, // 10 seconds
  });
  - return stdout;
  + return stderr || stdout;
  } catch (error) {
  const { message } = error;
  