This is an example of hoe one can clone an experiment and change it from code:
https://github.com/allegroai/trains/blob/master/examples/automation/task_piping_example.py

A full HPO optimization process (basically the same idea only with optimization algorithms deciding on the next set of parameters) is also available:
https://github.com/allegroai/trains/blob/master/examples/optimization/hyper-parameter-optimization/hyper_parameter_optimizer.py