Backing up your git repos

git clone --mirror path/to/original path/to/dest/.git
cd path/to/dest
git config --bool core.bare false
git checkout anybranch

https://stackoverflow.com/questions/67699/how-to-clone-all-remote-branches-in-git

p.s. можно просто git clone --mirror path/to/original,
затем — mv original.git .git и далее — по инструкции git config..., git checkout...