Hi @aserputov
Sorry didn't really make the issue clear originally, the problem is the output of the getInitDefaultBranch() from exec comes back with a \n so when its appended to the list of cmds it also have the linebreak in there

args:        []string{"push", "-u", "origin", initDefaultBranch},

@davidcheung I hope I'm correct. After checking how the file is working, I think the "%s" might create a new line.
What else could it be?

I suspect it is from the git config --get init.defaultBranch command, for printing nicely in stdout they may have appended a linebreak, we could probably trim it out from the output