$ git clone -n https://src.fedoraproject.org/rpms/rubygem-atomic.git /var/lib/mock/f31-build-50771-27434/root/chroot_tmpdir/scmroot/rubygem-atomic
Cloning into '/var/lib/mock/f31-build-50771-27434/root/chroot_tmpdir/scmroot/rubygem-atomic'...
$ git reset --hard 54c8f98b0a76aee56afdd1a95cd9fb45b7c0d8a5
HEAD is now at 54c8f98 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild