$ git clone -n https://src.fedoraproject.org/rpms/rubygem-gstreamer.git /var/lib/mock/f31-build-52130-27619/root/chroot_tmpdir/scmroot/rubygem-gstreamer
Cloning into '/var/lib/mock/f31-build-52130-27619/root/chroot_tmpdir/scmroot/rubygem-gstreamer'...
$ git reset --hard 625938f87171314755181e457b88722b43ad3459
HEAD is now at 625938f 3.3.6