To compile you need to install libgit2, qt and libgraphviz
sudo apt-get install libgit2-dev qt5-default libgraphviz-dev
Then you can configure the project
cmake .
If you get an error that it could not find libgitcpp, you can hint cmake to it
cmake -DPC_LIBGITCPP_INCLUDEDIR=/path/to/libgitcpp/include .
And then start compiling
make
Note: This repository contains a 64bit version of libgitcpp. If you are compiling on a 32bit system, you need to compile libgitcpp yourself