$ git clone -n https://src.fedoraproject.org/rpms/lego.git /var/lib/mock/f45-build-15671-478/root/chroot_tmpdir/scmroot/lego
Cloning into '/var/lib/mock/f45-build-15671-478/root/chroot_tmpdir/scmroot/lego'...
$ git fetch origin 96815216f4bca1d1a61d33b435e704968298c689:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lego
 * [new ref]         96815216f4bca1d1a61d33b435e704968298c689 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9681521 Update to 5.4.0 upstream release