$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Refcount.git /var/lib/mock/f31-build-44413-26120/root/thebuilddir/tmp/scmroot/perl-Devel-Refcount
Cloning into '/var/lib/mock/f31-build-44413-26120/root/thebuilddir/tmp/scmroot/perl-Devel-Refcount'...
$ git reset --hard e72e8f34ba918f5651007ae7328a8fac5ff71730
HEAD is now at e72e8f3 Perl 5.30 rebuild