Gitbase: Exploring Git repos with SQL: 
Git has become the de-facto standard for code versioning, but its popularity didn’t remove the complexity of performing deep analyses of the history and contents of source code repositories.
SQL, on the other hand, is a battle-tested language to query large codebases as its adoption by projects like Spark and BigQuery shows.
So it is just logical that at source{d} we chose these two technologies to create gitbase: the code-as-data solution for large-scale analysis of git repositories with SQL.
read more: Opensource.com francesc
Supporting Open Source.
Have you tried: Diving with Sharks?