This package is a helper package to the R implementation of Git, git2r. It provides routines to visualize activity in git repositories, such as commit frequency, author contributions and also (eventually) allow you to generate a full contribution graph (like you see on a GitHub profile) for one or more repositories.
The package is in early development but should be complete soon.
Installation
library(devtools)
devtools::install_github("ropensci/ggit")