Some command line fu to check some basic git repo stats.  Links to more info.

COUNT LINES OF CODE IN REPO BY USER:
git ls-tree -r -z --name-only HEAD -- | xargs -0 -n1 git blame --line-porcelain HEAD |grep  "^author "|sort|uniq -c|sort -nr

http://stackoverflow.com/questions/4589731/git-blame-statistics