$ git clone -n https://src.fedoraproject.org/rpms/gstreamermm.git /var/lib/mock/f31-build-85670-31616/root/chroot_tmpdir/scmroot/gstreamermm
Cloning into '/var/lib/mock/f31-build-85670-31616/root/chroot_tmpdir/scmroot/gstreamermm'...
$ git reset --hard 13336f42f40df0fc59f3242a39b73117fe6b4327
HEAD is now at 13336f4 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild