$ git clone -n https://src.fedoraproject.org/rpms/lld.git /var/lib/mock/f40-build-799478-142420/root/chroot_tmpdir/scmroot/lld
Cloning into '/var/lib/mock/f40-build-799478-142420/root/chroot_tmpdir/scmroot/lld'...
$ git fetch origin 90fc76bc70042ebf2c905030d250a709e20b8a2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lld
 * [new ref]         90fc76bc70042ebf2c905030d250a709e20b8a2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90fc76b Enable s390x arch