$ git clone -n https://gitee.com/mgb01105731/gcc_1.git /var/lib/mock/dist-an23-build-358734-71155/root/chroot_tmpdir/scmroot/gcc_1
Cloning into '/var/lib/mock/dist-an23-build-358734-71155/root/chroot_tmpdir/scmroot/gcc_1'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/gcc_1
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Updating files:  29% (8/27)
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Updating files: 100% (27/27), done.
HEAD is now at a541b2e update to 12.3.0