$ git clone -n https://src.fedoraproject.org/rpms/gentoo.git /var/lib/mock/f31-build-53723-27894/root/chroot_tmpdir/scmroot/gentoo
Cloning into '/var/lib/mock/f31-build-53723-27894/root/chroot_tmpdir/scmroot/gentoo'...
$ git reset --hard e0d1f0abd0f93def6f00a29b5ffe790a2b7e79b5
HEAD is now at e0d1f0a - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild