$ git clone -n https://src.fedoraproject.org/rpms/mingw-Cython.git /var/lib/mock/f40-build-2228462-53081/root/chroot_tmpdir/scmroot/mingw-Cython
Cloning into '/var/lib/mock/f40-build-2228462-53081/root/chroot_tmpdir/scmroot/mingw-Cython'...
$ git fetch origin 31deaa615c5832f3f25de6737ec793bc26b33162:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-Cython
 * [new ref]         31deaa615c5832f3f25de6737ec793bc26b33162 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31deaa6 Update to 3.0.6