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What is git Reflog used for?
Reflog is a mechanism to record when the tip of branches are updated. This command is to manage the information recorded in it. Basically every action you perform inside of Git where data is stored, you can find it inside of the reflog.
What does git Reflog expire do?
Expire – git reflog expire The expire subcommand cleans up old or unreachable reflog entries. The expire subcommand has potential for data loss. This subcommand is not typically used by end users, but used by git internally.
What does Head @{ 3 refer to?
ref~3 means the commit’s first parent’s first parent’s first parent. And so on. ref^ is shorthand for ref^1 and means the commit’s first parent. But where the two differ is that ref^2 means the commit’s second parent (remember, commits can have two parents when they are a merge).
Is git Reflog public?
Main Git reflog vs. log is that the log is a public accounting of the repository’s commit history while the reflog is a private, workspace-specific accounting of the repo’s local commits.
What is git rebase command?
The git rebase command is used to merge the history of two branches on a repository. It is often used to integrate changes from one branch onto another branch. You should only use the git rebase command locally; it should not be used on a public repository.
What files can be searched in using git grep?
Git ships with a command called grep that allows you to easily search through any committed tree, the working directory, or even the index for a string or regular expression. For the examples that follow, we’ll search through the source code for Git itself.
What’s the difference between A ref and a reflog?
Refs and the Reflog 1 Hashes. The most direct way to reference a commit is via its SHA-1 hash. 2 Refs. A ref is an indirect way of referring to a commit. 3 Packed Refs. 4 Special Refs. 5 Refspecs. 6 Relative Refs. 7 The Reflog. 8 Summary.
What happens when an entry is removed from the reflog?
The “expire” subcommand prunes older reflog entries. Entries older than expire time, or entries older than expire-unreachable time and not reachable from the current tip, are removed from the reflog. This is typically not used directly by end users — instead, see git-gc [1].
What’s the expire date of reflog in Git?
By default, the reflog date of expiry is set to 90 days. Pass –expire=time argument to git reflog expire for specifying an expire time. The git reflog delete subcommand is designed for deleting passed reflog entries. However, the end users avoid executing this subcommand, because, as in the case of git reflog expire , there is a risk of data loss.
Do you need to prune reflog entries in Git?
Prune any reflog entries that point to “broken commits”. A broken commit is a commit that is not reachable from any of the reference tips and that refers, directly or indirectly, to a missing commit, tree, or blob object. This computation involves traversing all the reachable objects, i.e. it has the same cost as git prune.