$ git clone -n https://src.fedoraproject.org/rpms/callgit.git /var/lib/mock/f31-build-56520-28225/root/thebuilddir/tmp/scmroot/callgit
Cloning into '/var/lib/mock/f31-build-56520-28225/root/thebuilddir/tmp/scmroot/callgit'...
$ git reset --hard 5aebc70c7dca6e628f4b02e49d79983fedfbc4b6
HEAD is now at 5aebc70 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild