How parametrized build could be performed

[eonezhang]

in the doc it said,

In case you define a parameter inside the branch specifier in Git configuration of the project, the plugin will replace the parameter value with the commit branch from the payload.
Replacing is done by matching ${PARAMETER_KEY} in the branch specifier to the parameter list for the project.
This is useful e.g. when you want to define a single project for all the branches in the repository.
Setup might look like this:
parametrized build with string parameter BRANCH_TO_BUILD, default = master
Source Code Management --> Branch specifier: origin/${BRANCH_TO_BUILD}

it seems not work, and even didn't know where to go.
is any example for it, or could be some can explain the detail.

Thanks in advance.