$ git clone -n https://src.fedoraproject.org/rpms/libb2.git /var/lib/mock/f31-build-58217-28425/root/chroot_tmpdir/scmroot/libb2
Cloning into '/var/lib/mock/f31-build-58217-28425/root/chroot_tmpdir/scmroot/libb2'...
$ git reset --hard 3a0967dec5316b8fe81df35db47fa58c536be33e
HEAD is now at 3a0967d - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild