$ git clone -n https://src.fedoraproject.org/rpms/cairomm.git /var/lib/mock/f31-build-63292-29348/root/chroot_tmpdir/scmroot/cairomm
Cloning into '/var/lib/mock/f31-build-63292-29348/root/chroot_tmpdir/scmroot/cairomm'...
$ git reset --hard 72b787d176b609918415984a70f33009c3040883
HEAD is now at 72b787d - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild