$ git clone -n https://src.fedoraproject.org/rpms/python-libnacl.git /var/lib/mock/f45-build-31391-652/root/chroot_tmpdir/scmroot/python-libnacl
Cloning into '/var/lib/mock/f45-build-31391-652/root/chroot_tmpdir/scmroot/python-libnacl'...
$ git fetch origin f0ce69ac8fb231316f0e20ea5245aa6e46e6d07e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-libnacl
 * [new ref]         f0ce69ac8fb231316f0e20ea5245aa6e46e6d07e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f0ce69a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild