$ git clone -n https://src.fedoraproject.org/rpms/ninja-build.git /var/lib/mock/f31-build-57636-28370/root/chroot_tmpdir/scmroot/ninja-build
Cloning into '/var/lib/mock/f31-build-57636-28370/root/chroot_tmpdir/scmroot/ninja-build'...
$ git reset --hard 4c45630f6e15af4edc4e96c43b18cb60bc651ca9
HEAD is now at 4c45630 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild