$ git clone -n https://src.fedoraproject.org/rpms/Cython.git /var/lib/mock/f41-build-850726-165591/root/chroot_tmpdir/scmroot/Cython
Cloning into '/var/lib/mock/f41-build-850726-165591/root/chroot_tmpdir/scmroot/Cython'...
$ git fetch origin 6021cd6d277dc0cf8d05f4a67ff5fb27a7952553:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/Cython
 * [new ref]         6021cd6d277dc0cf8d05f4a67ff5fb27a7952553 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6021cd6 Update to 3.0.11