I usually want to pass arguments to git log, not to less. This is not possible with the default piped alias. This is remedied by wrapping it in a function, and pasting the arguments explicitly to git log using the bash shorthand $@.
Here is an updated version of your l80 that supports passing parameters to git log:<p>l = "!f() { git log $@ --abbrev-commit --date=short --pretty=format:'%x00%h%x00%cd%x00%s%x00%an%x00%d' | gawk -F '\\0' '{ printf \"%s\\033[31m%s\\033[0m \\033[32m%s\\033[0m %-80s \\033[30;1m%s\\033[0m\\033[33m%s\\n\", $1, $2, $3, gensub(/(.{79}).{2,}/, \"\\\\1\",\"g\",$4), $5, $6 }' | less -R ; } ; f"