Gaining advanced insights from Git repository history
...The first is a program written in Go that takes a Git repository and executes a Directed Acyclic Graph (DAG) of analysis tasks over the full commit history. The second is a Python script that shows some predefined plots over the collected data. These two tools are normally used together through a pipe. It is possible to write custom analyses using the plugin system. It is also possible to merge several analysis results together - relevant for organizations. The analyzed commit history includes branches, merges, etc. Hercules has been successfully used for several internal projects at source{d}.
Simple, seamless, lightweight time tracking for Git
...GTM will automatically save the time spent associated with your commit. To check the time of the last commit type gtm report. GTM provides git aliases to make this easy. It defaults to origin for the remote repository. Time data can be retrieved from the remote repository by fetching.