$ git clone -n https://gitee.com/mgb01105731/velocity_1.git /var/lib/mock/dist-an23-build-327134-69055/root/chroot_tmpdir/scmroot/velocity_1
Cloning into '/var/lib/mock/dist-an23-build-327134-69055/root/chroot_tmpdir/scmroot/velocity_1'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/velocity_1
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8ea864 update to version 2.3