$ git clone -n https://gitee.com/src-opencloudos-rpms/gcc /var/lib/mock/dist-oc8-build-118821-69828/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/dist-oc8-build-118821-69828/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin oc8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gcc
 * [new branch]      oc8        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1578f1 Version Rollback to 8.5.0-23.1