$ git clone -n https://src.fedoraproject.org/rpms/golang-github-google-martian.git /var/lib/mock/f31-build-93197-32397/root/chroot_tmpdir/scmroot/golang-github-google-martian
Cloning into '/var/lib/mock/f31-build-93197-32397/root/chroot_tmpdir/scmroot/golang-github-google-martian'...
$ git reset --hard d349c48bf0ca1780deabf7943f7b3e435a60d218
HEAD is now at d349c48 Release 3.0.0