$ git clone -n https://gitee.com/fr4nk2/shim-unsigned-aarch64.git /var/lib/mock/dist-an23-build-183987-60278/root/chroot_tmpdir/scmroot/shim-unsigned-aarch64
Cloning into '/var/lib/mock/dist-an23-build-183987-60278/root/chroot_tmpdir/scmroot/shim-unsigned-aarch64'...
$ git fetch origin 974480f422d61da6461a970f59bbf5c787d96832:KOJI_FETCH_HEAD
From https://gitee.com/fr4nk2/shim-unsigned-aarch64
 * [new ref]         974480f422d61da6461a970f59bbf5c787d96832 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 974480f update to 15.6