$ git clone -n https://gitee.com/mgb01105731/gnome-shell.git /var/lib/mock/dist-an23-build-326238-68984/root/chroot_tmpdir/scmroot/gnome-shell
Cloning into '/var/lib/mock/dist-an23-build-326238-68984/root/chroot_tmpdir/scmroot/gnome-shell'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/gnome-shell
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a218e70 update to 45.1