It may happen that you need to install a python project with pip from git(hub). That’s pretty easy:

pip install --user -U git+git://github.com/TomasTomecek/sen.git

How about a specific commit?

pip install --user -U git+git://github.com/TomasTomecek/sen.git@1bfab11eb1ad5183fc0722fb62254adaae5bea14

Don’t get scared by

Could not find a tag or branch '1bfab11eb1ad5183fc0722fb62254adaae5bea14', assuming commit.