$ git clone -n https://src.fedoraproject.org/rpms/libxml2.git /var/lib/mock/f31-build-47710-26959/root/chroot_tmpdir/scmroot/libxml2
Cloning into '/var/lib/mock/f31-build-47710-26959/root/chroot_tmpdir/scmroot/libxml2'...
$ git reset --hard 177238b6306ac240ab683747bd8412f7507aaa84
HEAD is now at 177238b - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild