The article/post (which has now suspiciously disappeared, might I add!) said it was a music video shoot... so it's probably either a cameo in one of IKON/Big Bang's music videos or a featuring. It looks like Jennie to me.
There is also an image circulating of what appears to be Jinny shooting something too.. with her back to the camera of course.
Which again could be a video shoot, if it is indeed her.
That or like a teaser trailer for the group, or teaser videos. I mean, with IKON and Big Bang coming soon, YG might finally begin properly teasing the girls again ahead of their Q3 debut (yeah right!)