clone repo in temp dir and then do the necessary steps in order to restore index.yaml

Author: Knappek

.travis.yml

@@ -55,7 +55,7 @@ jobs:
         - git config --global user.email "${GH_EMAIL}"
         - echo "machine github.com login ${GH_NAME} password ${GH_TOKEN}" > ~/.netrc
         - cd website && yarn install && GIT_USER="${GH_NAME}" yarn run publish-gh-pages
-        - git checkout gh-pages && git checkout $(git rev-list -n1 HEAD -- index.yaml)~1 -- index.yaml && git add index.yaml && git commit -m "Auto-restore Helm chart repo index after Docusaurus publish" && git push --verbose
+        - tempdir=$(mktemp -d) && mkdir -p $tempdir && cd $tempdir &&  git clone --single-branch --branch gh-pages [email protected]:Accenture/reactive-interaction-gateway.git && cd reactive-interaction-gateway && git checkout $(git rev-list -n1 HEAD -- index.yaml)~1 -- index.yaml && git add index.yaml && git commit -m "Auto-restore Helm chart repo index after Docusaurus publish" && git push --verbose
     - stage: sourcedocs
       <<: *elixir-env
       script: