I do not know why, but git://git.apache.org/incubator-impala.git
seems to be behind https://git-wip-us.apache.org/repos/asf/incubator-impala.git In that the git:// one does not have branch-2.7.0. If you have trouble with something, try checking gerrit (gerrit.cloudera.org:29418/Impala-ASF) or the https:// git remote.
