$ git clone -n https://src.fedoraproject.org/rpms/rust-target-lexicon0.12.git /var/lib/mock/f45-build-45343-822/root/chroot_tmpdir/scmroot/rust-target-lexicon0.12
Cloning into '/var/lib/mock/f45-build-45343-822/root/chroot_tmpdir/scmroot/rust-target-lexicon0.12'...
$ git fetch origin 34c012e588a2adcb19f726a031afd837762defb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-target-lexicon0.12
 * [new ref]         34c012e588a2adcb19f726a031afd837762defb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34c012e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild