http://stackoverflow.com/questions/11284350/how-to-see-code-changes-after-git-pull
#107 may be helpful for this
consider new = !sh -c 'git log $1@{1}..$1@{0} "$@"' invoked as git new HEAD credit
new = !sh -c 'git log $1@{1}..$1@{0} "$@"'
git new HEAD