$ git clone -n https://src.fedoraproject.org/rpms/quaternion.git /var/lib/mock/f41-build-side-1-2768864-32100/root/chroot_tmpdir/scmroot/quaternion
Cloning into '/var/lib/mock/f41-build-side-1-2768864-32100/root/chroot_tmpdir/scmroot/quaternion'...
$ git fetch origin 9e3eec82f6348825b0fa13dbdc189d27213dfd38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/quaternion
 * [new ref]         9e3eec82f6348825b0fa13dbdc189d27213dfd38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e3eec8 Update to 0.0.96.1