$ git clone -n https://src.fedoraproject.org/rpms/bird.git /var/lib/mock/f31-build-51226-27496/root/chroot_tmpdir/scmroot/bird
Cloning into '/var/lib/mock/f31-build-51226-27496/root/chroot_tmpdir/scmroot/bird'...
$ git reset --hard 51c6ad3a53064331f8f94efb14f2ecd62e3aefb9
HEAD is now at 51c6ad3 Merge branch 'master' of https://src.fedoraproject.org/forks/robert/rpms/bird