$ git clone -n https://src.fedoraproject.org/rpms/libxcb.git /var/lib/mock/f41-build-810221-146460/root/chroot_tmpdir/scmroot/libxcb
Cloning into '/var/lib/mock/f41-build-810221-146460/root/chroot_tmpdir/scmroot/libxcb'...
$ git reset --hard 01b9df709d30d3370f74793e58bebbcd4989bfcb
HEAD is now at 01b9df7 libxcb 1.17.0