When I try to install git along with its suggested packages, I get errors indicating that git-daemon-run and runit failed to install properly. Looking up the error messages leads me to https://bugs.launchpad.net/ubuntu/+source/runit/+bug/1448164 .
However, this bug thread does not seem to offer very good solutions or workarounds.
Note that I originally ran into this on Ubuntu 15.10, running under VirtualBox. However, I believe 15.04 and 16.04 LTS are also affected.