Convert HG to Git repository

On Ubuntu:

~# ls
repository.hg
~# apt-get install hg-fast-export
~# git init new_repository.git

~# ls
repository.hg new_repository.git
~# cd new_repository.git
~/new_repository.git# hg-fast-export -r ../repository.hg

You will recieve a summary text in the end, like

git-fast-import statistics:
---------------------------------------------------------------------
Alloc'd objects: 5000
Total objects: 478 ( 14 duplicates )
blobs : 133 ( 14 duplicates 54 deltas of 133 attempts)
trees : 216 ( 0 duplicates 194 deltas of 196 attempts)
commits: 129 ( 0 duplicates 0 deltas of 0 attempts)
tags : 0 ( 0 duplicates 0 deltas of 0 attempts)
Total branches: 4 ( 1 loads )
marks: 1024 ( 129 unique )
atoms: 16
Memory total: 2344 KiB
pools: 2110 KiB
objects: 234 KiB
---------------------------------------------------------------------
pack_report: getpagesize() = 4096
pack_report: core.packedGitWindowSize = 1073741824
pack_report: core.packedGitLimit = 8589934592
pack_report: pack_used_ctr = 901
pack_report: pack_mmap_calls = 215
pack_report: pack_open_windows = 1 / 1
pack_report: pack_mapped = 331971 / 331971
---------------------------------------------------------------------

In the end do:

~/new_repository.git# git checkout HEAD

Test your repo with git log.