$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-CommonNS.git /var/lib/mock/f45-build-27462-624/root/chroot_tmpdir/scmroot/perl-XML-CommonNS
Cloning into '/var/lib/mock/f45-build-27462-624/root/chroot_tmpdir/scmroot/perl-XML-CommonNS'...
$ git fetch origin 1727a6c67151de7312f53cc0b69f275d86c43568:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-CommonNS
 * [new ref]         1727a6c67151de7312f53cc0b69f275d86c43568 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1727a6c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild