Leak in pipe is barely above the concrete floor. If try to cut and solder will be too low. Any suggestions? Too close to concrete for SharkBite connections.
You can solder a copper repair coupler over the hole. It's basically just like a sleeve. You don't have to cut the pipe near the concrete.
Sand and flux the bottom inch of the copper pipe above the concrete. Cut off the copper pipe maybe 1 foot higher than the concrete, and drop a copper repair coupler that doesn't have an internal stop onto the pipe and slide it down to the top of the concrete.
Next shorten the copper pipe enough to add a second copper coupler that does have internal stops. Sand and flux the pipe. Add the coupler, solder both couplers at the same time.
The first coupler seals the leak, and the second coupler is needed to repair the pipe after cutting it.
Make sure to sand and flux the inside of the couplers too.
The coupler idea in another answer is a good one.
If the leak is too close to the concrete surface so as to create an uncertain solder joint you can consider chipping out the concrete in a narrow ring around the pipe. This could easily be 10 to 12 mm deep to allow the coupler to slide more past the leak.
If you decide to do this you must really clean all concrete that has adhered to the pipe and shine up the copper well so that the flux and solder will flow and adhere to the pipe and coupler.
Were it my house I'd assume that the corrosion goes beyond what's visible. I'd rent or borrow a concrete saw and cut out a 12" square of concrete around the pipe. I'd then make suitable repairs with common copper parts (or PEX) and simply fill the opening with washed rock for a nice appearance and future access.