feat(git-aliases): add checkout with username (fixes #1712) (#1732)

* feat(git-aliases): add checkout with username

this can be useful for creating a branch with a common prefix

* fix(git-alais): change quotes

aliases/available/git.aliases.bash

@@ -65,6 +65,7 @@ alias gco='git checkout'
 alias gcom='git checkout master'
 alias gcb='git checkout -b'
 alias gcob='git checkout -b'
+alias gcobu='git checkout -b ${USER}/'
 alias gct='git checkout --track'
 alias gcpd='git checkout master; git pull; git branch -D'
 alias gexport='git archive --format zip --output'