GitHub Fork Mass Sync Script

A simple Bash script to mass-sync all your GitHub forks with their upstream repositories entirely server-side using the GitHub API. No local cloning. No disk usage. Fast and repeatable.

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Features

• Syncs all forked repositories you own
• Uses GitHub’s native fork sync (server-side)
• No cloning or local git operations
• Safe to re-run anytime
• Works with public and private forks
• Syncs default branch only

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Requirements

• bash shell
• GitHub CLI (gh)
• jq
• Authenticated GitHub CLI session

Install dependencies

macOS

brew install gh jq

Ubuntu / Debian

sudo apt install gh jq

Fedora

sudo dnf install gh jq

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Usage

1. Clone this repository

git clone https://github.com/TBadru/sync_forked_repos.git
cd sync_forked_repos

2. Authenticate with GitHub

gh auth login

3. Make the script executable

chmod +x sync_forked_repos.sh

4. Run the script

./sync_forked_repos.sh

That’s it. All your forks will be synced automatically.

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Important Notes

• Only the default branch of each fork is synced
• Uses --force to ensure forks exactly match upstream
• Any commits on your fork’s default branch will be overwritten
• Feature branches are not affected

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How It Works

1. Fetches all repositories you own
2. Filters only forked repositories
3. Uses gh repo sync to sync each fork with its upstream
4. Performs all operations on GitHub, not locally

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License

MIT License.