may be just literally git revert  'long_string_of_numbers_and_letters' where this long string just first say 15 symbols from corresponding commit as seen in 'git log'? 

or just manually uncomment this line... 

On Sunday, May 30, 2021, Andrea paz <gamberucci.andrea@gmail.com> wrote:
Sorry, I don't understand how to do a git revert in order to do an
export to EDL with my files. Phyllis xml files give me the usual
error, but still the original sources are missing.