$ git clone -n https://src.fedoraproject.org/rpms/cantata.git /var/lib/mock/f40-build-2283394-55587/root/chroot_tmpdir/scmroot/cantata
Cloning into '/var/lib/mock/f40-build-2283394-55587/root/chroot_tmpdir/scmroot/cantata'...
$ git fetch origin 00848a86671d2ef1ca66502ad47c83a518a2a002:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cantata
 * [new ref]         00848a86671d2ef1ca66502ad47c83a518a2a002 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00848a8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild