New default dist-git branch: rawhide
    
    In some places we also reference main which will be a symlink to
    the rawhide branch and we currently still reference master to be
    backward compatible (even though once the rawhide branch appears
    the master branch will be removed and blocked).
    
    Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>
    Co-authored-by: Mohan Boddu <mboddu@bhujji.com>