$ git clone -n https://gitee.com/src-opencloudos-rpms/rubygem-diff-lcs.git /var/lib/mock/dist-oc9-build-51530-14595/root/chroot_tmpdir/scmroot/rubygem-diff-lcs
Cloning into '/var/lib/mock/dist-oc9-build-51530-14595/root/chroot_tmpdir/scmroot/rubygem-diff-lcs'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/rubygem-diff-lcs
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9df3d0 import rubygem-diff-lcs-1.5.0-4.tl4