$ git clone -n https://gitee.com/opencloudos-stream/golang-github-guregu-null.git /var/lib/mock/dist-ocs23-epol9-build-249773-24423/root/chroot_tmpdir/scmroot/golang-github-guregu-null
Cloning into '/var/lib/mock/dist-ocs23-epol9-build-249773-24423/root/chroot_tmpdir/scmroot/golang-github-guregu-null'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/golang-github-guregu-null
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f729412 update