Can a GIT branch have a subset of data?

I am trying to figure out if a GIT branch can have a subset of project data, like the example below.

I am working on a java, spring, maven project, and my source is in

src/main/java

and my JSP pages are:

src/main/webapp

we are thinking of outsourcing JSP pages to a diff group, but we don’t want them to change the Java code, so we are trying to think if we can display the branch with

src/main/webapp

and then combine it again in