$ git clone -n https://gitee.com/mgb01105731/gcc_1.git /var/lib/mock/dist-an23-build-358898-71155/root/chroot_tmpdir/scmroot/gcc_1
Cloning into '/var/lib/mock/dist-an23-build-358898-71155/root/chroot_tmpdir/scmroot/gcc_1'...
$ git fetch origin 2788791d17002172a348f8d62cee5dab28c7d2ee:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/gcc_1
 * [new ref]         2788791d17002172a348f8d62cee5dab28c7d2ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2788791 update to 12.3.0