Jet engines cannot run on just anything or any fuel.
However jet engines can run on various different combustible fuels other than jet fuel.
Even military turbine jet engines are made to operate on a range of different fuels, including AvGas and even heating oil.
Although the military turbine jet engines are optimized for running on and burning JP4 and JP5 fuels.
And some light aircraft jet engines can run on MoGas or even Jet A1 which can also operate on diesel fuel.
Turbine jet engines, including the ones used in jet aircraft are made to burn fuel and expand the resulting hot gases, which create thrust.
Kerosene based fuels like JP4 and JP5 are preferred in military jet engines for their energy efficiency and energy density although they are designed to handle a range of fuels.
And although not ideal, some jet engines can also run on other fuels like AvGas or diesel fuel, especially in certain light aircraft or military applications.
However using of fuels in jet engines other than the optimized fuels can require more extensive maintenance for the engine to ensure the engine is functioning properly and ensure longevity of the engine.
Kerosene based jet fuel is recommended for use in most jet engines as it offers a higher energy density when compared to gasoline and contributes to better performance and range for jet aircraft.