With `-e` the repository is cloned, leading to `git clean` skipping
the cloned dependencies due to the `.git` directory, and forcing manual
removal.
[nwatkins@daq ceph]$ git clean -dxf
Skipping repository build-doc/virtualenv/src/breathe
Skipping repository build-doc/virtualenv/src/sphinx-ditaa
Signed-off-by: Noah Watkins <nwatkins@redhat.com>
Sphinx == 1.6.3
--e git+https://github.com/ceph/sphinx-ditaa.git@py3#egg=sphinx-ditaa
--e git+https://github.com/michaeljones/breathe#egg=breathe
+git+https://github.com/ceph/sphinx-ditaa.git@py3#egg=sphinx-ditaa
+git+https://github.com/michaeljones/breathe#egg=breathe