How do COIN get onto guerilla anything?

By asking the locals.
Following up on spoor.
Sending aircraft to find the guerilla.
Sending troops to intercept on the ground.
Co-ordinated ground and air effort.

How does the guerilla deal with being intercepted in this way?

Tries to terrorize or indoctrinate the locals.
Once the intercept begins he uses counter tracking and concealment techniques, while maintaining the correct distance from ground forces. Too close and they see him. Too far ahead and pincer forces get him.

Here is a video: https://youtu.be/U1CC1d1DKaw