Travel to US with a valid visa and the transfer receipt which is RFE

I am currently in India. My visa transfer is in RFE and USCIS is asking for client letter. Employer says that I need to join so they can get the client letter from the client. They will respond to RFE after I join them.

I know it is a risk to join the new employer when the visa transfer is in RFE and I am ready for that.

However, my concern is would I be allowed to enter US with my current visa (which is still valid for 1 year) and the I-797C Receipt notice for the visa transfer so I can join the new employer as soon as I reach US?

Please advice. It is urgent.