$ git clone -n https://src.fedoraproject.org/rpms/rubiks.git /var/lib/mock/f39-build-1457943-33026/root/chroot_tmpdir/scmroot/rubiks
Cloning into '/var/lib/mock/f39-build-1457943-33026/root/chroot_tmpdir/scmroot/rubiks'...
$ git fetch origin 02f6cecb04fa3e2e33cb26e439769a7f01003ca6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubiks
 * [new ref]         02f6cecb04fa3e2e33cb26e439769a7f01003ca6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02f6cec Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild