Both Reverse Attack and Reverse Magic work that way, that attacker/caster is targeting himself. So after reversing reversed action, he would still be forced to target himself.
In other words:
1. Warlock is making attack against Wizard. Wizard has Reverse Attack and he reveals it and pays it's cost.
2. Attacker (Warlock) is now attacking himself. He has Reverse Attack and he reveals it and pays it's cost.
3. Attacker (still Warlock) is now forced to attack himself.
As you can see, there is no sense to pay cost of Reverse Magic/Attack when you already has reversed action. You still have to reveal those enchantments and you will lose them.