git: Add `browse` alias
git: Add `browse` alias

Alias to fetch an external repository and checkout the HEAD of a
specified ref. Useful for browsing, testing, and modifying code that
someone wants you to merge.

codfish/dotfiles,Stubby/dotfiles,pmacom/dotfiles,sdillingham/dotfiles,Stubby/dotfiles,SBoudrias/dotfiles,senorflor/dotfiles,micahwood/linux-dotfiles,lgaechter/dotfiles,intiocean/dotfiles,Gastove/dotfiles,necolas/dotfiles,seiryu9/dotfiles,micahwood/linux-dotfiles,micahwood/linux-dotfiles,marc0uk/dotfiles,SiTaggart/dotfiles,seiryu9/dotfiles,saclark/dotfiles,bronxct1/dotfiles,jmyser/dotfiles,codfish/dotfiles,micahwood/linux-dotfiles,pertoyra/dotfiles,bronxct1/dotfiles,senorflor/linux-dotfiles,micahwood/linux-dotfiles