$ git clone -n https://gitee.com/src-opencloudos-rpms/re2.git /var/lib/mock/dist-oc9-build-121608-71707/root/chroot_tmpdir/scmroot/re2
Cloning into '/var/lib/mock/dist-oc9-build-121608-71707/root/chroot_tmpdir/scmroot/re2'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/re2
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 320fe55 import re2-20220601-7.tl4