How can I undo git reset --hard HEAD~1?

Question

Is it possible to undo the changes caused by the following command? If so, how?

git reset --hard HEAD~1 

Answer 1

Pat Notz is correct. You can get the commit back so long as it's been within a few days. git only garbage collects after about a month or so unless you explicitly tell it to remove newer blobs.

$ git init Initialized empty Git repository in .git/  $ echo "testing reset" > file1 $ git add file1 $ git commit -m 'added file1' Created initial commit 1a75c1d: added file1  1 files changed, 1 insertions(+), 0 deletions(-)  create mode 100644 file1  $ echo "added new file" > file2 $ git add file2 $ git commit -m 'added file2' Created commit f6e5064: added file2  1 files changed, 1 insertions(+), 0 deletions(-)  create mode 100644 file2  $ git reset --hard HEAD^ HEAD is now at 1a75c1d... added file1  $ cat file2 cat: file2: No such file or directory  $ git reflog 1a75c1d... HEAD@{0}: reset --hard HEAD^: updating HEAD f6e5064... HEAD@{1}: commit: added file2  $ git reset --hard f6e5064 HEAD is now at f6e5064... added file2  $ cat file2 added new file 

You can see in the example that the file2 was removed as a result of the hard reset, but was put back in place when I reset via the reflog.