$ git clone -n https://src.fedoraproject.org/rpms/caribou.git /var/lib/mock/f31-build-56636-28239/root/thebuilddir/tmp/scmroot/caribou
Cloning into '/var/lib/mock/f31-build-56636-28239/root/thebuilddir/tmp/scmroot/caribou'...
$ git reset --hard ece7d26021cafd26f7bda33c6ae872b5646fdc48
HEAD is now at ece7d26 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild