Git Parameter inherits branches from preceding Git parameters

### Jenkins and plugins versions report

There is a persistent issue where a Git parameter incorrectly includes branches from all preceding Git parameter definitions

### What Operating System are you using (both controller, and any agents involved in the problem)?

Jenkins

### Reproduction steps

Steps to Reproduce:
Define multiple Git parameters in a single configuration (e.g., PARAM_A and PARAM_B).

Configure PARAM_B with a specific repository or filter.

Observe that PARAM_B displays its own branches plus all branches associated with PARAM_A.

### Expected Results

Each parameter should only display branches relevant to its own specific configuration/repository.

### Actual Results

Subsequent parameters inherit and append the branch lists of all preceding parameters.

### Anything else?

_No response_

### Are you interested in contributing a fix?

_No response_