$ git clone -n https://gitee.com/ocs-upgrade/rubygem-diff-lcs.git /var/lib/mock/dist-ocs23-base-build-317692-33438/root/chroot_tmpdir/scmroot/rubygem-diff-lcs
Cloning into '/var/lib/mock/dist-ocs23-base-build-317692-33438/root/chroot_tmpdir/scmroot/rubygem-diff-lcs'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/ocs-upgrade/rubygem-diff-lcs
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0081935 Upgrade to version 1.6.2