git-sync

.gitconfig

[alias]
 sync = "!~/path/to/git-sync"

git-sync.sh

#!/bin/sh
REPODIR=/data/projects

if [ $# -eq 0 ]; then
  $0 `dirname $0`
                find $REPODIR -type d -name .git -exec $0 {} \;
else
        GITDIR="$1"
        if [ ! -d $GITDIR ]; then
                echo "Directory does not exist."
                exit 1
        fi

        if [ "`basename $GITDIR`" != ".git" ]; then
                if [ ! -d $GITDIR/.git ]; then
                        echo "No .git directory found. Bare repository?"
                        exit 1
                fi
        fi

        cd $GITDIR

        git fetch 2> /dev/null | grep -v "up to date" | grep -v "Done"
        git pull 2> /dev/null | grep -v "up to date" | grep -v "Done"
        git push --porcelain 2> /dev/null | grep -v "up to date" | grep -v "Done"
        git push --porcelain --tags 2> /dev/null | grep -v "up to date" | grep -v "Done"
fi

exit 0