$ git clone -n https://gitee.com/mgb01105731/gcc-toolset-10-gcc_2.git /var/lib/mock/dist-an23.2-gcc-toolset-10-build-399565-72353/root/chroot_tmpdir/scmroot/gcc-toolset-10-gcc_2
Cloning into '/var/lib/mock/dist-an23.2-gcc-toolset-10-build-399565-72353/root/chroot_tmpdir/scmroot/gcc-toolset-10-gcc_2'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/gcc-toolset-10-gcc_2
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31845c6 init upstream from 10