$ git clone -n https://src.fedoraproject.org/rpms/python-rfc3339-validator.git /var/lib/mock/f45-build-32776-662/root/chroot_tmpdir/scmroot/python-rfc3339-validator
Cloning into '/var/lib/mock/f45-build-32776-662/root/chroot_tmpdir/scmroot/python-rfc3339-validator'...
$ git fetch origin 469f0f8ea3ee16dfe97fc200d70020f334516500:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-rfc3339-validator
 * [new ref]         469f0f8ea3ee16dfe97fc200d70020f334516500 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 469f0f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild