5parkSprained89

I need help trying to mod 1.7.10 forgegradle i was able to almost get everything working except it's trying to download the 1.7.10 jar from http://s3.amazonaws.com/Minecraft.Download/versions/1.7.10/1.7.10.jar i want to try to change it to https://piston-data.mojang.com/v1/objects/e80d9b3bf5085002218d4be59e668bac718abbc6/client.jar or a different url is there a way to do that? (please don't say that it's unsupported i know that and that's also the reason i want to try to mod it)