$ git clone -n https://src.fedoraproject.org/rpms/rubygem-cairo.git /var/lib/mock/f31-build-86493-31686/root/chroot_tmpdir/scmroot/rubygem-cairo
Cloning into '/var/lib/mock/f31-build-86493-31686/root/chroot_tmpdir/scmroot/rubygem-cairo'...
$ git reset --hard 5f4157363fe59a4eda16df39f9c4a36571d793d0
HEAD is now at 5f41573 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild