$ git clone -n https://src.fedoraproject.org/rpms/cantor.git /var/lib/mock/f40-build-2145550-50880/root/chroot_tmpdir/scmroot/cantor
Cloning into '/var/lib/mock/f40-build-2145550-50880/root/chroot_tmpdir/scmroot/cantor'...
$ git fetch origin 79708b4d47b6a092b4551232921e26846ca2ca56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cantor
 * [new ref]         79708b4d47b6a092b4551232921e26846ca2ca56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79708b4 24.01.85