don't run git during the regress suite.

Index: test/irc.lua
--- test/irc.lua.orig
+++ test/irc.lua
@@ -2,11 +2,9 @@ local server_port = (os.getenv("IRC_HOST_PORT") or "ir
 local channel = os.getenv("IRC_CHANNEL")
 local url = os.getenv("JOB_URL") or "???"
 
-local remote = io.popen("git remote get-url origin"):read('*l')
-local is_origin = remote:find('~technomancy/fennel$') ~= nil
+local is_origin = false
 
-local branch = io.popen("git rev-parse --abbrev-ref HEAD"):read('*l')
-local is_main = branch == 'main'
+local is_main = false
 
 -- This may fail in future if libera chat once again blocks builds.sr.ht
 -- from connecting; it currently works after we asked them to look into it
