$ git clone -n https://src.fedoraproject.org/rpms/rubygem-eventmachine.git /var/lib/mock/f31-build-86696-31700/root/chroot_tmpdir/scmroot/rubygem-eventmachine
Cloning into '/var/lib/mock/f31-build-86696-31700/root/chroot_tmpdir/scmroot/rubygem-eventmachine'...
$ git reset --hard 36f8fca006486ecf30291fa04866ddecf0b806da
HEAD is now at 36f8fca - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild