bootstrap: use "git -h" instead of "git --help" Use "git -h" for testing for supported options instead of "git --help". The short-form option only shows a summary, and doesn't layout the full man page, which is much faster and saves a dependency. (We found out that git uses man in a build environment of http://hydra.nixos.org/, which by default doesn't have man installed.) Grep for the full option name in the summary, too. Signed-off-by: Andreas Gruenbacher <agruen@suse.de>