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今天从 github 上 clone 代码的时候，出现了一个错误，重试多次后仍然出现，错误如下：
>$ git clone https://github.com/BOINC/boinc boinc Cloning into 'boinc'... remote: Enumerating objects: 26, done. remote: Counting objects: 100% (26/26), done. remote: Compressing objects: 100% (25/25), done. error: RPC failed; curl 56 GnuTLS recv error (-54): Error in the pull function. fatal: The remote end hung up unexpectedly fatal: early EOF fatal: index-pack failed
后来发现，只要换成 ssh 方式 clone 就可以了：
>$ git clone git@github.com:BOINC/boinc.git Cloning into 'boinc'... remote: Enumerating objects: 26, done. remote: Counting objects: 100% (26/26), done. remote: Compressing objects: 100% (25/25), done. remote: Total 290179 (delta 8), reused 6 (delta 1), pack-reused 290153 Receiving objects: 100% (290179/290179), 233.82 MiB | 160.00 KiB/s, done. Resolving deltas: 100% (223552/223552), done.