$ git clone -n https://src.fedoraproject.org/rpms/dist-git.git /var/lib/mock/f40-build-2663306-66986/root/chroot_tmpdir/scmroot/dist-git
Cloning into '/var/lib/mock/f40-build-2663306-66986/root/chroot_tmpdir/scmroot/dist-git'...
$ git fetch origin 9dead15c6672bc0c7db2ff9adcbe79e31288b9ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dist-git
 * [new ref]         9dead15c6672bc0c7db2ff9adcbe79e31288b9ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9dead15 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild