$ git clone -n https://gitee.com/fundawang/gcc.git /var/lib/mock/dist-an23-build-290498-64987/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/dist-an23-build-290498-64987/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin 2ee9180aab7996c290bd20d4dc908300a0f54e14:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/gcc
 * [new ref]         2ee9180aab7996c290bd20d4dc908300a0f54e14 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ee9180 12.3.0