$ git clone -n https://gitee.com/mgb01105731/libb2.git /var/lib/mock/dist-an23-build-356335-71085/root/chroot_tmpdir/scmroot/libb2
Cloning into '/var/lib/mock/dist-an23-build-356335-71085/root/chroot_tmpdir/scmroot/libb2'...
$ git reset --hard origin/a23
HEAD is now at e8123e1 init package from upstream