$ git clone -n https://src.fedoraproject.org/rpms/gentoo.git /var/lib/mock/f31-build-99129-33126/root/chroot_tmpdir/scmroot/gentoo
Cloning into '/var/lib/mock/f31-build-99129-33126/root/chroot_tmpdir/scmroot/gentoo'...
$ git reset --hard abf0b500220a5a12e497b61f1d84906a269ccfee
HEAD is now at abf0b50 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild