Work fourlough

I got a year custody with half time and maybe alternative like cpac/work fourlough I was on probation and violated with felony dui gbi my sentence is on jan 28 on sentencing will I go in no matter and do the sheriff decide if I can go to WF/cpac while I’m already in real custody or the judge will just tell me to show up to WF and stuff how does it work . sorry if I don’t make sense