Not fake, just badly written “meme.”

She sold her possessions as a “donation” to the Red Army for a T-34 tank. She didn’t buy a tank. She then trained 5 months as a tank driver - and drove a tank for three months before getting hit by a shell fragment, while trying to repair the track.

For fuller context, from Wikipedia,

While living in Tomsk, she learned that her husband was killed fighting the forces of Nazi Germany near Kiev in August 1941. The news took two years to reach her. The news angered her greatly, and she became determined to fight the Germans in vengeance for her husband's death. She sold all of her possessions to donate a tank for the Red Army. She requested the tank to be named "Fighting Girlfriend" ("Боевая подруга") and that she be allowed to drive it. The State Defense Committee agreed to this. The tank Mariya donated was a T-34 medium tank.

The image is clearly not a T-34 - but a German-captured IS-2 heavy tank.