$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-Libm.git /var/lib/mock/f31-build-44722-26250/root/thebuilddir/tmp/scmroot/perl-Math-Libm
Cloning into '/var/lib/mock/f31-build-44722-26250/root/thebuilddir/tmp/scmroot/perl-Math-Libm'...
$ git reset --hard bf276832fcfb9baf081df58e788de7154a66c676
HEAD is now at bf27683 Perl 5.30 rebuild