I'm getting this error when using one of my aliases bdone
You asked to pull from the remote '--prune', but did not specify a branch. Because this is not the default configured remote for your current branch, you must specify a branch on the command line.
This is the alias I use
alias.bclean !f() { git branch --merged ${1-master} | grep -v ${1-master}$ | xargs git branch -d; }; f
alias.bdone !f() { git checkout ${1-master} && git up && git bclean ${1-master}; }; f
I have nothing to commit nothing to commit, working directory clean