$ git clone -n https://gitee.com/ocs-upgrade/nginx.git /var/lib/mock/dist-ocs23-build-211675-15327/root/chroot_tmpdir/scmroot/nginx
Cloning into '/var/lib/mock/dist-ocs23-build-211675-15327/root/chroot_tmpdir/scmroot/nginx'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/ocs-upgrade/nginx
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 100d99b Upgrade to version 1.27.0