JenkinsFile 配置添加到新分支中的新解压缩文件

Question

I have a folder on an artifactory server and I'm using Jenkins integration to watch that location and trigger a build if there is an update (new Zip file) Next step I added my bitbucket details and confirmed its working from Jenkins and deploying a Jenkins file to the given location to hold the configuration. When the Zip file arrives in the artifactory location I need to unpack the contents and then commit to a new branch(off master) in the given Bitbucket repo. Generally I would do something manually like this

git branch <branch name path>
git checkout <path above>
echo "my new stuff" >  mynewstuff(after unpacking)

git add -m "Test JIRA" mynewstuff
^^^s/add/commit
git push

I can do this manually but trying to work out if its correct adding to the Jenkins file or if it can be done in Jenkins UI itself in a more efficient way.