Print out the newly created commitid at the end, for use in other scripts.
treef90b605b21503c4326fc94e7363b581ab110fc8f
-rw-r--r-- 3 .gitignore
lrwxrwxrwx 14 git-subtree -> git-subtree.sh
-rwxr-xr-x 3101 git-subtree.sh
-rw-r--r-- 23 shellopts.sh