$ git clone -n https://src.fedoraproject.org/rpms/jbig2dec.git /var/lib/mock/f31-build-55201-28101/root/chroot_tmpdir/scmroot/jbig2dec
Cloning into '/var/lib/mock/f31-build-55201-28101/root/chroot_tmpdir/scmroot/jbig2dec'...
$ git reset --hard 4a121af01ef5a7acb676579d4b1a379617857a58
HEAD is now at 4a121af - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild