Convert georeferenced obj from local coordinates to UTM?

Can anyone tell me how to convert “odm_textured_model_geo.obj” from local coordinates to UTM? I see there is a file “odm_georeferencing_model_geo.txt” which has a single UTM coordinate in it. I’m guessing this is the reference point for the local grid. I tried adding those values to the list of texture coordinates (vt) in the .obj file, but that did not work… I’m a bit over my head here, but it seems like it should be an easy process.