$ git clone -n https://src.fedoraproject.org/rpms/python-lexicon.git /var/lib/mock/f45-build-31365-652/root/chroot_tmpdir/scmroot/python-lexicon
Cloning into '/var/lib/mock/f45-build-31365-652/root/chroot_tmpdir/scmroot/python-lexicon'...
$ git fetch origin 94c7ccc430c443ea02578179349535b7044820a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-lexicon
 * [new ref]         94c7ccc430c443ea02578179349535b7044820a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94c7ccc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild