$ git clone -n https://gitee.com/opencloudos-stream/rubygem-diff-lcs.git /var/lib/mock/dist-ocs23-build-20787-1041/root/chroot_tmpdir/scmroot/rubygem-diff-lcs
Cloning into '/var/lib/mock/dist-ocs23-build-20787-1041/root/chroot_tmpdir/scmroot/rubygem-diff-lcs'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rubygem-diff-lcs
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4fae97 OCS package init