$ git clone -n https://src.fedoraproject.org/rpms/rust-iso8601.git /var/lib/mock/f39-build-1493055-34536/root/chroot_tmpdir/scmroot/rust-iso8601
Cloning into '/var/lib/mock/f39-build-1493055-34536/root/chroot_tmpdir/scmroot/rust-iso8601'...
$ git fetch origin cb416f3eb4a642f79633aa10c8c0d9c717bce32d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-iso8601
 * [new ref]         cb416f3eb4a642f79633aa10c8c0d9c717bce32d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb416f3 Regenerate with rust2rpm v24