warning: refname 'master' is ambiguous.

[maelvls]

I kept having:

$ git rb -i master       
warning: refname 'master' is ambiguous.
warning: refname 'master' is ambiguous.

I noticed that the master tag exists along side the master branch, which causes all sorts of issues. I'm not sure why the master tag was created in the first place, so I'll go ahead and remove it. It pointed to b2384c5:

[wallrj]

Looks like you removed the tag. Thanks @maelvls

$ git fetch --all --prune --tags --prune-tags
Fetching origin
From github.com:jetstack/jetstack-secure
 - [deleted]         (none)     -> master
...

$ git tag | grep -i master