$ git clone -n https://gitee.com/src-anolis-os/sane-backends.git /var/lib/mock/dist-an23-build-339804-69795/root/chroot_tmpdir/scmroot/sane-backends
Cloning into '/var/lib/mock/dist-an23-build-339804-69795/root/chroot_tmpdir/scmroot/sane-backends'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/sane-backends
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71fa704 rebuild