### Create a directory to hold Git hooks
```
mkdir -p ~/.git_template/hooks/
```
### Add This file to ~/.git_template/hooks/prepare-commit-msg
```ruby
#!/bin/sh

if [ -z "$BRANCHES_TO_SKIP" ]; then
  BRANCHES_TO_SKIP=(master develop)
fi

BRANCH_NAME=$(git symbolic-ref --short HEAD)
BRANCH_NAME="${BRANCH_NAME##*/}"

BRANCH_EXCLUDED=$(printf "%s\n" "${BRANCHES_TO_SKIP[@]}" | grep -c "^$BRANCH_NAME$")
BRANCH_IN_COMMIT=$(grep -c "\[$BRANCH_NAME\]" $1)

if [ -n "$BRANCH_NAME" ] && ! [[ $BRANCH_EXCLUDED -eq 1 ]] && ! [[ $BRANCH_IN_COMMIT -ge 1 ]]; then
  sed -i.bak -e "1s/^/[$BRANCH_NAME] /" $1
fi
```
### Make the file executable
```
chmod a+x ~/.git_template/hooks/prepare-commit-msg
```

### Tell Git where to find the hooks
```ruby
git config --global init.templatedir '~/.git_template'
```

### To add the custom hook to a project
navigate to the project, then:
```
git init
```