$ git clone -n https://gitee.com/opencloudos-stream/perl-B-COW.git /var/lib/mock/dist-ocs23-build-27032-1191/root/chroot_tmpdir/scmroot/perl-B-COW
Cloning into '/var/lib/mock/dist-ocs23-build-27032-1191/root/chroot_tmpdir/scmroot/perl-B-COW'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/perl-B-COW
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2e9fc8 OCS package init