$ git clone -n https://src.fedoraproject.org/rpms/libXcomposite.git /var/lib/mock/f31-build-58081-28403/root/chroot_tmpdir/scmroot/libXcomposite
Cloning into '/var/lib/mock/f31-build-58081-28403/root/chroot_tmpdir/scmroot/libXcomposite'...
$ git reset --hard 78838537f47497cd98c7e5ed4c58719e82288f32
HEAD is now at 7883853 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild