$ git clone -n https://gitee.com/src-opencloudos-rpms/libtar.git /var/lib/mock/dist-oc8-build-38376-12415/root/chroot_tmpdir/scmroot/libtar
Cloning into '/var/lib/mock/dist-oc8-build-38376-12415/root/chroot_tmpdir/scmroot/libtar'...
$ git reset --hard origin/oc8
HEAD is now at 4ead3e7 import libtar-1.2.20-17.tl3