I mean, it's certainly possible. Pure methane is odorless, of course, but most industrial sources of methane(as I'm sure SpaceX gets their fuel from) add odorants to make it possible to smell a gas leak fairly easily. Most of those chemicals would get burned off and dispersed during combustion and reexpansion in the atmosphere, so it's not likely you'd be able to smell much of anything at that point
I mean, it's certainly possible. Pure methane is odorless, of course, but most industrial sources of methane(as I'm sure SpaceX gets their fuel from) add odorants to make it possible to smell a gas leak fairly easily. Most of those chemicals would get burned off and dispersed during combustion and reexpansion in the atmosphere, so it's not likely you'd be able to smell much of anything at that point