  We investigate holographic fermions in general asymptotically scaling
geometries with hyperscaling violation exponent $\theta$, which is a natural
generalization of fermions in Lifshitz spacetime. We prove that the retarded
Green functions in this background satisfy the ARPES (angle-resolved
photoemission spectroscopy) sum rules by introducing a dynamical source on a UV
brane for zero density fermionic systems. The big difference from the Lifshitz
case is that the mass of probe fermions decoupled from the UV theory and thus
has no longer been restricted by unitarity bound. We also study finite density
fermions at finite temperature, with dynamical exponent $z=2$. We find that the
dispersion relation is linear but the logarithm of the spectral function is not
linearly related to the logarithm of $k_\bot =k-k_F$, independent of charge $q$
and $\theta$. Furthermore, we show that with the increasing of charge, new
branches of Fermi surfaces emerge and tend to gathering together to form a
shell-like structure when the charge reaches some critical value beyond which a
wide band pattern appears in the momentum-charge plane. However, all sharp
peaks will be smoothed out when $\theta$ increases, no matter how much large
the charge is.
