New upstream release - 1.20
    
    - Bash completion for mockbuild --no-clean* options (pbabinca)
    - Hijack load_kojisession to catch auth problems (pbabinca)
    - Upload source files with our preferred hash (bochecha)
    - pass keyword args as keyword args (mikeb)
    - For rawhide use fedora-rawhide-* mock config instead of fedora-devel-*
      (pbabinca)