A bit of cut and paste will explain better than me...
LOCAL $ git remote update
Fetching origin
remote: Counting objects: 25, done.
remote: Compressing objects: 100% (12/12), done.
remote: Total 13 (delta 10), reused 0 (delta 0)
Unpacking objects: 100% (13/13), done.
fatal: bad object fa0da15b2ea5cc3e4eb9ed414b99d6a9d7da7864
error: git://git.heresymail.org/lib%2Fmpfr did not send all necessary
objectsUPSTREAM $ git fsck
dangling blob ded848b21db04fcadf77a4a5d9f81955b4315c9f
dangling blob 9c3976919b3cee56eabc3c9c9dfe5d223ce32686
dangling blob e17ab25a3a91bed830ddb06da4af1132434d5ee4
dangling blob 20a612ab361058838f680d72c1f4f8cb462ce1a2UPSTREAM $ git gc
Counting objects: 974, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (954/954), done.
Writing objects: 100% (974/974), done.
Total 974 (delta 572), reused 0 (delta 0)LOCAL $ git remote update
Fetching origin
remote: Counting objects: 25, done.
remote: Compressing objects: 100% (10/10), done.
remote: Total 13 (delta 3), reused 11 (delta 2)
Unpacking objects: 100% (13/13), done.
fatal: bad object fa0da15b2ea5cc3e4eb9ed414b99d6a9d7da7864
error: git://git.heresymail.org/lib%2Fmpfr did not send all necessary
objectsLOCAL $ DELETE LOCAL REPO
LOCAL $ git clone <upstream>
Cloning into bare repository '/src/lib/mpfr'...
remote: Counting objects: 972, done.
remote: Compressing objects: 100% (382/382), done.
remote: Total 972 (delta 570), reused 971 (delta 570)
Receiving objects: 100% (972/972), 2.01 MiB, done.
Resolving deltas: 100% (570/570), done.
error: refs/stash does not point to a valid object!UPSTREAM $ git stash list
stash@{0}: WIP on (no branch): f648dd0 Import 3.1.0 from tarballUPSTREAM $ git stash clear
LOCAL $ DELETE LOCAL REPO
LOCAL $ git clone <upstream>
Cloning into bare repository '/src/lib/mpfr'...
remote: Counting objects: 972, done.
remote: Compressing objects: 100% (382/382), done.
remote: Total 972 (delta 570), reused 971 (delta 570)
Receiving objects: 100% (972/972), 2.01 MiB, done.
Resolving deltas: 100% (570/570), done.UPSTREAM $ git version
git version 1.7.8.2LOCAL $ git version
git version 1.7.8.2Hope that's useful!
Andrew Walrond