fetch the correct branch. Oh and removing travis

Author: Shlomi Noach

script/cibuild-gh-ost-replica-tests

@@ -6,7 +6,7 @@ whoami
 
 # Clone gh-ost-ci-env
 # Only clone if not already running locally at latest commit
-remote_commit=$(git ls-remote https://github.com/github/gh-ost-ci-env.git HEAD | cut -f1)
+remote_commit=$(git ls-remote https://github.com/github/gh-ost-ci-env.git real-tar-gz | cut -f1)
 local_commit="unknown"
 [ -d "gh-ost-ci-env" ] && local_commit=$(cd gh-ost-ci-env && git log --format="%H" -n 1)
 
@@ -16,6 +16,7 @@ echo "local commit is:  $local_commit"
 if [ "$remote_commit" != "$local_commit" ] ; then
   rm -rf ./gh-ost-ci-env
   git clone https://github.com/github/gh-ost-ci-env.git
+  git fetch origin real-tar-gz
   git checkout real-tar-gz
 fi