$ git clone -n https://src.fedoraproject.org/rpms/rust-ciborium-io.git /var/lib/mock/f45-build-40803-776/root/chroot_tmpdir/scmroot/rust-ciborium-io
Cloning into '/var/lib/mock/f45-build-40803-776/root/chroot_tmpdir/scmroot/rust-ciborium-io'...
$ git fetch origin 697e393f6c2d5fe68044c20a82efc7e8a968ddac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ciborium-io
 * [new ref]         697e393f6c2d5fe68044c20a82efc7e8a968ddac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 697e393 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild