$ git clone -n https://src.fedoraproject.org/rpms/x3270.git /var/lib/mock/f40-build-791623-137674/root/chroot_tmpdir/scmroot/x3270
Cloning into '/var/lib/mock/f40-build-791623-137674/root/chroot_tmpdir/scmroot/x3270'...
$ git fetch origin 429977202ca01865ed1c1ccf1d2756f0c1290092:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/x3270
 * [new ref]         429977202ca01865ed1c1ccf1d2756f0c1290092 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4299772 - updated to 4.3ga5(#2264784)