$ git clone -n https://src.fedoraproject.org/rpms/libblkio.git /var/lib/mock/f40-build-786146-134194/root/chroot_tmpdir/scmroot/libblkio
Cloning into '/var/lib/mock/f40-build-786146-134194/root/chroot_tmpdir/scmroot/libblkio'...
$ git fetch origin 43e95a79d6929f1ff760708623431f7b07045e6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libblkio
 * [new ref]         43e95a79d6929f1ff760708623431f7b07045e6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43e95a7 Update Rust macro usage