$ git clone -n https://gitee.com/fr4nk2/shim-unsigned-aarch64.git /var/lib/mock/dist-an23-build-194656-60869/root/chroot_tmpdir/scmroot/shim-unsigned-aarch64
Cloning into '/var/lib/mock/dist-an23-build-194656-60869/root/chroot_tmpdir/scmroot/shim-unsigned-aarch64'...
$ git fetch origin e528438c93a8ba9786bf030f86631649f90bdae2:KOJI_FETCH_HEAD
From https://gitee.com/fr4nk2/shim-unsigned-aarch64
 * [new ref]         e528438c93a8ba9786bf030f86631649f90bdae2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e528438 update to 15.6