I did'nt Know Kroger's Fuel run $125 charge on your Credit Card when you Purchase Gas

NOTE * Looked online at my credit card statement and saw there was (2) $125 pending charging.  $250 . Called the credit card company because I thought someone had charged on my credit card. I was told some gas pump (Krogers was one) run the $125 amount on your card even though you only purchase $10 worth of gas.