I have no hot water pressure in the kitchen sink, but the pressure is fine throughout the rest of the house. We recently repaired a hot water leak in the bathroom. What could be my problem?

Your problem is obviously localized. You may have dirt inside your kitchen faucet preventing water flow. The block can be at the angle stop, water supply connector, or / and the faucet cartridge itself. In some cases, it could even be kinked water supply line.

What kind / brand of faucet is it ? Do you have flexible water supply connectors under your sink ?

Everything Milo listed is correct. Lets start with the more common place, in the valve mixing body. Do you know the steps to remove and clean the cartridge, if so do them now.

What brand and model number is your faucet, Thanks.

John