$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-ucd-segment.git /var/lib/mock/f45-build-45898-829/root/chroot_tmpdir/scmroot/rust-unic-ucd-segment
Cloning into '/var/lib/mock/f45-build-45898-829/root/chroot_tmpdir/scmroot/rust-unic-ucd-segment'...
$ git fetch origin 5d06a56a9953be205aeaa260e8f1716c09048cf7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-ucd-segment
 * [new ref]         5d06a56a9953be205aeaa260e8f1716c09048cf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d06a56 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild