Claim a git commit id so that other developers know not to use it. Reciprocate by not using theirs.
Call dibs on a commit id
No longer do you need to send an email to everyone in your company or post a heads-up on LinkedIn that you're reserving a sha-1 hash for future use.
Now it's as easy as git dibs.
Never again accidentally steal another developer's dibs
Install our post-commit hook in your repo to roll back any attempt to violate another developer's trust and goodwill. Tell your teammates they're lucky the reset is --soft, and you won't be so generous next time.
Check for dibs
If you don't want a post-commit hook calling you a cotton-headed ninnymuggins for trying to steal an innocent developer's commit id, you can preemptively check for called-dibs with the following git alias. You don't want to commit a war crime, do you?