$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-parent.git /var/lib/mock/f40-build-2164542-50972/root/chroot_tmpdir/scmroot/apache-commons-parent
Cloning into '/var/lib/mock/f40-build-2164542-50972/root/chroot_tmpdir/scmroot/apache-commons-parent'...
$ git fetch origin 5611113403c3d4afdd0777f69c2e5cf33aedb9e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-parent
 * [new ref]         5611113403c3d4afdd0777f69c2e5cf33aedb9e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5611113 Update javapackages test plan to f40