$ git clone -n https://gitee.com/ocs-upgrade/tang.git /var/lib/mock/dist-ocs23-base-build-318520-33501/root/chroot_tmpdir/scmroot/tang
Cloning into '/var/lib/mock/dist-ocs23-base-build-318520-33501/root/chroot_tmpdir/scmroot/tang'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/ocs-upgrade/tang
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b94a0a0 Upgrade to version 15