Not sure how this is supposed to work.The stupidity of throwing active dissenters into an army which already has terrible morale problems and minimal ground level leadership is insane. Just increases the likelihood of another winter revolution. If Putin is still in charge / alive in 6 months I'd be surprised.
Why would the dissenters not just shoot their officers ? There is a history of this too in the Russian military.
The callup is obviously a reaction to the hawks demanding action but it has the huge downside of directly effecting the Russian population who have not really cared to date. Now they care. What happens next (internally in Russia) ?