Apart from simply exposing git(dir, args, callback, [logger]) there are a couple of nice utilities.

npm install gits

var gits = require('gits');

API:

• gits.align(dir, callback) - runs git reset, recovery commands and git pull in a directory
• gits.sync(origin, branch, dir, callback) - clones/pulls origin/branch into dir
• gits.bsync(origin, target, branches, prefix, callback) - clones multiple branches (or all if branches is null) from origin into subdirectories under target dir. 'prefix' is prepended to subdirectory names
• gits.bsyncAll(origin, target, prefix, callback) - clones all branches from origin into target
• gits.currentBranch(dir, callback) - returns the current branch of a directory
• gits.git(dir, argsArray, callback, [logger]) - just runs git command line
• gits.remotes(dir, callback) - returns a hash with the remotes in the repo
• gits.log(dir, opts, callback) - lists all the commits under a directory
• gits.prune(dir, callback) - runs "git remote prune origin" for a directory
• gits.pruneAll(basrDir, callback) - runs "git remote prune origin" against all subdirectories of "baseDir"

MIT