OK, it took a very long time (over 2.5 hours, I think) but I managed to build and install got+git from ports (also had to install gettext-tools, xmlto and asciidoc from packages first). Thanks for the tip.

BTW, all this shows that Git also became bloated beyond repair.

The xmlto dependency also pulled lynx, and asciidoc pulled w3m. Now I have two text-mode Web browsers I won't use anyway on my aarch64 VPS.