If you take out the panel and remove the regulator/motor you can wedge the glass up, as it will then free moving in the rails.
But while the regulator is in there and likely stuck/jammed, no.
So you'll need to start by removing the panel and checking out the situation, and probably plan to pull the regulator. Wedge the window up (I've used a length of 2x4 before myself) and then start looking at fixing the regulator or replacing it.
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