$ git clone -n https://src.fedoraproject.org/rpms/diffutils.git /var/lib/mock/f42-build-3290588-41426/root/chroot_tmpdir/scmroot/diffutils
Cloning into '/var/lib/mock/f42-build-3290588-41426/root/chroot_tmpdir/scmroot/diffutils'...
$ git fetch origin 0d56b9fccf696018c3b4ff28984d36603de6b9a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/diffutils
 * [new ref]         0d56b9fccf696018c3b4ff28984d36603de6b9a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d56b9f Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild