$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-Libxml2.git /var/lib/mock/f40-build-750217-114906/root/chroot_tmpdir/scmroot/perl-Alien-Libxml2
Cloning into '/var/lib/mock/f40-build-750217-114906/root/chroot_tmpdir/scmroot/perl-Alien-Libxml2'...
$ git reset --hard 0a496fc2c3a6cec5fcd3251600d033a420254228
HEAD is now at 0a496fc Rebuild against libxml2-2.12.1