I know that there is no "new project" button on SonarQube UI. However, I have two branches of the same project that I want to do analysis on. The thing is that since the project names are the same, SonarQube will upload the analysis results of the two branches into the same project on SonarQube Server. How do I configure SonarQube so that one branch will upload analysis results to one project and the other branch will upload results to another project on SonarQube server?
You might want to look at this part of the Sonar documentation, specifically at the sonar.branch parameter. It seems to be designed for what you want to do, and is working that way for us.