$ git clone -n https://src.fedoraproject.org/rpms/libsigc++.git /var/lib/mock/f31-build-59472-28584/root/chroot_tmpdir/scmroot/libsigc++
Cloning into '/var/lib/mock/f31-build-59472-28584/root/chroot_tmpdir/scmroot/libsigc++'...
$ git reset --hard 9fb26cf63d4bf1b08a61d3a53f7bef503ce1b77a
HEAD is now at 9fb26cf - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild