I had a similar idea previously for interstellar travel. My idea was to fire fuel pellets ahead of the rocket so it would collect them up as it accelerated, relative velocity being not too much.

However Anything orbiting the sun wouldn’t be able to stay on target to fire the fuel for long. Calculating the trajectory to account for gravity would be problematic. The whole process would be too brittle, if something went wrong it could well be impossible to recover.

Nifty idea was to fire the pellets before and after, so when it flips mid-flight it could collect fuel pellets to decelerate.