brew install gitup

brew.log

brew install gitup                                                                                                                                                                                        ⏎
==> Downloading https://homebrew.bintray.com/bottles/gitup-0.3.yosemite.bottle.tar.gz
######################################################################## 100.0%
==> Pouring gitup-0.3.yosemite.bottle.tar.gz
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink bin/gitup
Target /usr/local/bin/gitup
already exists. You may want to remove it:
  rm '/usr/local/bin/gitup'

To force the link and overwrite all conflicting files:
  brew link --overwrite gitup

To list all files that would be deleted:
  brew link --overwrite --dry-run gitup

Possible conflicting files are:
/usr/local/bin/gitup -> /opt/homebrew-cask/Caskroom/gitup/latest/GitUp.app/Contents/SharedSupport/gitup
==> Summary
🍺  /usr/local/Cellar/gitup/0.3: 197 files, 1.9M