Of course, as long as you persuade your bank to believe you

You provide information such as change of primary residence from Country tax record. Anything that will make underwriter believe your intention. Once a loan is approved and payment starts. You may be able to move the primary residence status back to your old house and physically move back to your old house. As long as bank doesn't find out, you'll be fine. However if they find out, you may get some trouble. But how high is the chance? I don't think it's very high.