  We report on an observation of a fractional quantum Hall effect in an
ultra-high quality two-dimensional hole gas hosted in a strained Ge quantum
well. The Hall resistance reveals precisely quantized plateaus and vanishing
longitudinal resistance at filling factors $\nu = 2/3, 4/3$ and $5/3$. From the
temperature dependence around $\nu = 3/2$ we obtain the composite fermion mass
of $m^\star \approx 0.4\,m_e$, where $m_e$ is the mass of a free electron.
Owing to large Zeeman energy, all observed states are spin-polarized and can be
described in terms of spinless composite fermions.
