$ git clone -n https://gitee.com/fundawang/shim-unsigned-aarch64.git /var/lib/mock/dist-an23-build-352715-70993/root/chroot_tmpdir/scmroot/shim-unsigned-aarch64
Cloning into '/var/lib/mock/dist-an23-build-352715-70993/root/chroot_tmpdir/scmroot/shim-unsigned-aarch64'...
$ git fetch origin fd838f1985e9fc6367f4c58441d2278e0ae31230:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/shim-unsigned-aarch64
 * [new ref]         fd838f1985e9fc6367f4c58441d2278e0ae31230 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd838f1 15.8