$ git clone -n https://src.fedoraproject.org/rpms/rubygem-eventmachine.git /var/lib/mock/f33-build-373797-61518/root/chroot_tmpdir/scmroot/rubygem-eventmachine
Cloning into '/var/lib/mock/f33-build-373797-61518/root/chroot_tmpdir/scmroot/rubygem-eventmachine'...
$ git reset --hard ae74024e851629c7ad1164ec78cb4554c7c99080
HEAD is now at ae74024 Add note about abandoned pure ruby mode.