我怎样才能恢复HEAD ^'S树？

tl; dr:是否可以恢复HEAD^树,如果它被删除而不是事先推送,如果其他一切都完好无损？

我不小心删掉了部分内容.git.我不完全确定缺少什么.

在发现git push不起作用后,我跑了一个git fsck:

Checking object directories: 100% (256/256), done.
Checking objects: 100% (1265/1265), done.
broken link from  commit f3419f630546ba02baf43f4ca760b02c0f4a0e6d
              to    tree 29616dfefd2bff59b7fb3177e99b4a1efc7132fa
broken link from  commit ccfe9502e24d2b5195008005d83155197a2dca25
              to    tree 0580c3675560cbfd3f989878a9524e35f53f08e9
broken link from  commit ccfe9502e24d2b5195008005d83155197a2dca25
              to  commit 0bca9b3a9f1dd9106922f5b4ec59cdc00dd6c049
broken link from    tree 6d33d35870281340c7c2f86c6d48c8f133b836bb
              to    blob 226d8a10a623acd943bb8eddd080a5929f3ccb2c
broken link from  commit db238d4a52ee8f18a04c038809bc6587d7643438
              to    tree 0b69ab3f6940a04684ee8c0c423ae7da89de749c
missing tree 0580c3675560cbfd3f989878a9524e35f53f08e9
dangling commit 05512f9ac09d932e7d9a11d490c8a2f117c0ca11
missing tree 29616dfefd2bff59b7fb3177e99b4a1efc7132fa
dangling commit 578464dde7d7b8628f77e536b4076cfa491d7602
missing blob 5d351b568abb734605ca4bf446e13cfd87ca9ce8
missing tree 0b69ab3f6940a04684ee8c0c423ae7da89de749c
missing commit 0bca9b3a9f1dd9106922f5b4ec59cdc00dd6c049
dangling blob d53a9d0f3364b648edbc4beede022e4594a84c35
missing blob 23db34f729a88c5f5f7fe6e281921f1334f493d1
dangling commit 8dcbde55462ca0c29e0ca339a49db95b43188ef1
dangling blob e59b25b9675625d0e6b8abfa37e955ab46493fd9
missing blob 226d8a10a623acd943bb8eddd080a5929f3ccb2c
dangling commit 85fdaaa579cf1ae2a8874e3e1f3c65d68b478179
dangling commit 075e9d72e90cc8bf3d960edd8376aaae0847f916
missing blob 83fec2ff8cfcaaa06c96917b6973ace96301e932
dangling commit a88e18e1c102d909361738fd70137b3f4a1c7496
dangling blob 9c6f61e0acffe2a1f5322cd2b72c181e95e9de75
dangling commit ca9fe0dd3123a731fc310b2a2285b00ef673de79

所以我的假设是我只是遗漏了一些可以从GitHub中恢复的信息.我的下意识反应是运行git fetch,但是返回时没有输出,因为它认为没有什么新东西可以获取.

我试过拆包.git/objects/pack/pack-ea43d1db155e4502c2250ec1d4608843715c8b1f.pack,有几种方法,但它从来没有用过.例如:

% git clone --mirror git://github.com/strugee/dots.git # returns bare repo
Cloning into bare repository 'dots.git'...
remote: Counting objects: 1331, done.
remote: Compressing objects: 100% (23/23), done.
remote: Total 1331 (delta 12), reused 0 (delta 0)
Receiving objects: 100% (1331/1331), 402.31 KiB | 197.00 KiB/s, done.
Resolving deltas: 100% (454/454), done.
Checking connectivity... done.
% ls dots.git
config  description  HEAD  hooks  info  objects  packed-refs  refs
% mkdir git-tmp; cd git-tmp
% git init
% git unpack-objects < ../dots.git/objects/pack/pack-ea43d1db155e4502c2250ec1d4608843715c8b1f.pack
error: inflate: data stream error (incorrect data check)
error: inflate returned -3

我每次都得到这个错误.(请记住:它是a --mirror,所以它是GitHub所具有的精确副本 - 对吗？那么它怎么会腐败？)

最终我意识到我实际上并不需要解压缩包文件.我可以把它复制回原始的回购中,Git会把它拿起来就好了.所以:

% cd ../configs
% cp ../dots.git/objects/pack/pack-ea43d1db155e4502c2250ec1d4608843715c8b1f.* .git/objects/pack/

而这似乎成功了.大多.

% git fsck
Checking object directories: 100% (256/256), done.
Checking objects: 100% (2596/2596), done.
broken link from  commit db238d4a52ee8f18a04c038809bc6587d7643438
              to    tree 0b69ab3f6940a04684ee8c0c423ae7da89de749c
dangling commit 05512f9ac09d932e7d9a11d490c8a2f117c0ca11
dangling commit 578464dde7d7b8628f77e536b4076cfa491d7602
missing blob 5d351b568abb734605ca4bf446e13cfd87ca9ce8
missing tree 0b69ab3f6940a04684ee8c0c423ae7da89de749c
dangling blob d53a9d0f3364b648edbc4beede022e4594a84c35
dangling commit 8dcbde55462ca0c29e0ca339a49db95b43188ef1
dangling commit 85fdaaa579cf1ae2a8874e3e1f3c65d68b478179
dangling commit 075e9d72e90cc8bf3d960edd8376aaae0847f916
missing blob 83fec2ff8cfcaaa06c96917b6973ace96301e932
dangling commit a88e18e1c102d909361738fd70137b3f4a1c7496
dangling commit ca9fe0dd3123a731fc310b2a2285b00ef673de79

正如你所看到的,修复了除了一个缺失链接之外的所有链接.事实证明,db238d是HEAD^我尚未推送的提交的ID(恰好是).我是否正确假设此存储库中的最后两个提交是不可恢复的,我将需要重新创建这些提交的内容？我在这种情况下做出了正确的决定吗？