$ git clone -n https://src.fedoraproject.org/rpms/perl-PerlIO-Layers.git /var/lib/mock/f31-build-44979-26250/root/thebuilddir/tmp/scmroot/perl-PerlIO-Layers
Cloning into '/var/lib/mock/f31-build-44979-26250/root/thebuilddir/tmp/scmroot/perl-PerlIO-Layers'...
$ git reset --hard f8c2e5a761c7cce9d1e8c5c10ae14a46303577fe
HEAD is now at f8c2e5a Perl 5.30 rebuild