$ git clone -n https://src.fedoraproject.org/rpms/calf.git /var/lib/mock/f31-build-63432-29359/root/chroot_tmpdir/scmroot/calf
Cloning into '/var/lib/mock/f31-build-63432-29359/root/chroot_tmpdir/scmroot/calf'...
$ git reset --hard 418c0f9f58a9e4b64be63135096ebcee44df4f04
HEAD is now at 418c0f9 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild