Compile knime-core?

I see that the knime-core is an open-source repo and was trying to compile it using

mvn clean install

but got an error related to the

maven-feature-branch-extension

not being found.

I’ve tried to Google for this extension but haven’t had any luck. Are there any docs on how to compile the

knime-core

application? I’m interested in making some changes and testing it locally.

Also, my initial question may just be wrong. I really want to know how to make a change to the Knime application and compile it.