Description of problem:
With upgraded mock to mock-1.2.2-1.fc20 (or mock-1.2.1-1.fc20)
on F-20, bash completion does not work

Version-Release number of selected component (if applicable):
mock-1.2.2-1.fc20.noarch

How reproducible:
100%

Steps to Reproduce:
1. mock --[tab][tab]
2.
3.

Actual results:
Does not show anything

Expected results:
With currently latest stable mock-1.1.41-3.fc20,
mock --[tab][tab] shows
$ mock --
--arch              --copyin            --help              --offline           --resultdir         --shell             --unpriv
--buildsrpm         --copyout           --init              --orphanskill       --root              --sources           --update
--chroot            --cwd               --install           --print-root-path   --rpmbuild_timeout  --spec              --verbose
--clean             --define            --installdeps       --quiet             --scm-enable        --target            --version
--cleanup-after     --disable-plugin    --no-clean          --rebuild           --scm-option        --trace             --with
--configdir         --enable-plugin     --no-cleanup-after  --remove            --scrub             --uniqueext         --without

Additional info: