$ git clone -n https://src.fedoraproject.org/rpms/rust-iso8601.git /var/lib/mock/f45-build-42722-796/root/chroot_tmpdir/scmroot/rust-iso8601
Cloning into '/var/lib/mock/f45-build-42722-796/root/chroot_tmpdir/scmroot/rust-iso8601'...
$ git fetch origin 84cd1c4dbe1145dc060b6db051c853507a352213:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-iso8601
 * [new ref]         84cd1c4dbe1145dc060b6db051c853507a352213 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84cd1c4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild