Set variable with commit title

Author: betatim

ci/publish

@@ -45,6 +45,7 @@ if [ "${TRAVIS_TAG:-}" == "" ]; then
     #       jupyterhub/binderhub@123abcd which will be understood as a reference
     #       by GitHub.
     PR_OR_HASH=$(git log -1 --pretty=%B | head -n1 | sed 's/^.*\(#[0-9]*\).*/\1/' | sed 's/^\([0-9a-f]*\)-.*/@\1/')
+    LATEST_COMMIT_TITLE=$(git log -1 --pretty=%B | head -n1)
     EXTRA_MESSAGE="${TRAVIS_REPO_SLUG}${PR_OR_HASH} ${LATEST_COMMIT_TITLE}"
     chartpress --push --publish-chart --long --extra-message "${EXTRA_MESSAGE}"
 else