Delete GitHub wiki revisions

gistfile1.sh

# Delete prior revisions from a GitHub wiki so that only the most-recent
# version of the content is available.

# Clone the wiki.
git clone https://github.com/[user]/[repo].wiki.git
# Example: git clone https://github.com/bz31/Buildroot.wiki.git

# Remove the .git folder.
cd [repo].wiki
rm -rf .git

# Reconstruct the local repo with only latest content
git init
git add .
git commit -m "Initial commit"

# Push to GitHub
git remote add origin https://github.com/[user]/[repo].wiki.git
git push -u --force origin master