$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-ucd-normal.git /var/lib/mock/f45-build-45908-829/root/chroot_tmpdir/scmroot/rust-unic-ucd-normal
Cloning into '/var/lib/mock/f45-build-45908-829/root/chroot_tmpdir/scmroot/rust-unic-ucd-normal'...
$ git fetch origin 7af26d4859d883aa9b78a0553d5ba167f34c0e81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-ucd-normal
 * [new ref]         7af26d4859d883aa9b78a0553d5ba167f34c0e81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7af26d4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild