$ git clone -n https://gitee.com/zhangwenlong01/gnome-boxes.git /var/lib/mock/dist-an23-build-515909-75165/root/chroot_tmpdir/scmroot/gnome-boxes
Cloning into '/var/lib/mock/dist-an23-build-515909-75165/root/chroot_tmpdir/scmroot/gnome-boxes'...
$ git fetch origin e21d34e496f0ca58077fee29fc9ca3212b3d1c8e:KOJI_FETCH_HEAD
From https://gitee.com/zhangwenlong01/gnome-boxes
 * [new ref]         e21d34e496f0ca58077fee29fc9ca3212b3d1c8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e21d34e rebuild for loongarch64