gitNextPrev.sh

git_prev() {
    git checkout HEAD~
}

# checkout next (newer) commit
git_next() {
    BRANCH=`git show-ref | grep $(git show-ref -s -- HEAD) | sed 's|.*/\(.*\)|\1|' | grep -v HEAD | sort | uniq`
    HASH=`git rev-parse $BRANCH`
    PREV=`git rev-list --topo-order HEAD..$HASH | tail -1`
    git checkout $PREV
}