$ git clone -n https://gitee.com/src-opencloudos-rpms/ipxe /var/lib/mock/dist-oc8-build-27601-8510/root/chroot_tmpdir/scmroot/ipxe
Cloning into '/var/lib/mock/dist-oc8-build-27601-8510/root/chroot_tmpdir/scmroot/ipxe'...
$ git reset --hard origin/oc8
HEAD is now at ec7f2ba import ipxe-20181214-11.git133f4c47.tl3