Wipes might or might not happen during the alpha phase. The discussion is still ongoing and no new statement other than  has been released.
This is the current official statement.
The alpha wipe is currently set to happen at some point on December.
What will be wiped?
- Character money wiped
- Gold Coins restored to original purchase amount
- Zombie kills reset
- Bandit kills reset
- Civilian kills reset
- Global Inventory reset
- Character inventory reset
- The Gold Coins. Those will be reset to it's original state, as purchased. This is good for you, because you can spend the currency on items. Basically it means, you get the shop items for free.
What won't be wiped?
- Your whole character. You will keep all your characters and names.