$ git clone -n https://src.fedoraproject.org/rpms/python-boto3.git /var/lib/mock/f41-build-692895-12743/root/chroot_tmpdir/scmroot/python-boto3
Cloning into '/var/lib/mock/f41-build-692895-12743/root/chroot_tmpdir/scmroot/python-boto3'...
$ git fetch origin 5d9d3c9cba341787bfab8cf8e84e28b5f7abec03:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-boto3
 * [new ref]         5d9d3c9cba341787bfab8cf8e84e28b5f7abec03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d9d3c9 1.34.116