`Strange metals' with resistivity depending linearly on temperature T down
to low-T have been a long-standing puzzle in condensed matter physics. Here,
we consider a model of itinerant spin-1/2 fermions interacting via on-site
Hubbard interaction and random infinite-ranged spin-spin interaction. We show
that the quantum critical point associated with the melting of the spin-glass
phase by charge fluctuations displays non-Fermi liquid behaviour, with local
spin dynamics identical to that of the Sachdev-Ye-Kitaev family of models. This
extends the quantum spin liquid dynamics previously established in the
large-M limit of SU(M) symmetric models, to models with physical SU(2)
spin-1/2 electrons. Remarkably, the quantum critical regime also features a
Planckian linear-T resistivity associated with a T-linear scattering rate
and a frequency dependence of the electronic self-energy consistent with the
Marginal Fermi Liquid phenomenology