Large downloads during the make process

[bens7372 at gmail.com]

I'm not so happy to download 13 GB for translations, among other
things, when running make, when I only specified an english language
and locale at configuration time. Could the makefile be changed to
simply do a shallow git clone, and/or fetch only the translation files
which are needed?

I've also found that extra libraries, ones that I have already
installed, through Arch Linux packages, are being downloaded when
running make. I presume these are patched versions that Libreoffice
needs for debugging.

Here's my autogen.input file:
--prefix=/opt/libreoffice-git 
--sysconfdir=/etc           
--with-lang=en-GB
--with-locales=en           
--with-help                 
--with-myspell-dicts
--with-vendor=Ben Cottrell        
--without-junit             
--without-system-dicts      
--disable-dconf             
--disable-odk               
--enable-python=system
--enable-debug
--enable-qt6      
--with-system-boost         
--with-system-cairo         
--with-system-clucene       
--with-system-curl          
--with-system-expat         
--with-system-harfbuzz      
--with-system-graphite      
--with-system-icu           
--with-system-jpeg          
--with-system-lcms2         
--with-system-libatomic_ops 
--with-system-libpng        
--with-system-libxml        
--with-system-nss           
--with-system-odbc          
--with-system-openldap      
--with-system-openssl       
--with-system-poppler       
--with-system-postgresql    
--with-system-redland       
--with-system-zlib