"Dubious ownership in repository" error running Docker container

[C-Duv]

I tried to run git-fame via Docker using the following commands but got an "fatal: detected dubious ownership in repository at '/repo'" error:

# Build playground
cd "$(mktemp -d)"
git init .
echo "foo" > file1
echo "bar" > file2
git commit -a -m "First commit"
# Run git-fame
docker run --rm casperdcl/git-fame --help
docker run --rm -v "$(pwd)":/repo casperdcl/git-fame

Obtained output is:

fatal: detected dubious ownership in repository at '/repo'
To add an exception for this directory, call:

	git config --global --add safe.directory /repo
Processing: 100%|██████████| 1/1 [00:00<00:00, 695.69file/s]
error: too many arguments given outside repository
usage: git shortlog [<options>] [<revision-range>] [[--] <path>...]
   or: git log --pretty=short | git shortlog [<options>]

    -c, --committer       group by committer rather than author
    -n, --numbered        sort output according to the number of commits per author
    -s, --summary         suppress commit descriptions, only provides commit count
    -e, --email           show the email address of each author
    -w[<w>[,<i1>[,<i2>]]]
                          linewrap output
    --group <field>       group by field

Total 
| Author   | loc   | coms   | fils   |  distribution   |
|----------|-------|--------|--------|-----------------|

I guess the git config --global --add safe.directory /repo should be done in the casperdcl/git-fame Docker image?