$ git clone -n https://src.fedoraproject.org/rpms/perl-HTML-TreeBuilder-LibXML.git /var/lib/mock/f45-build-23965-601/root/chroot_tmpdir/scmroot/perl-HTML-TreeBuilder-LibXML
Cloning into '/var/lib/mock/f45-build-23965-601/root/chroot_tmpdir/scmroot/perl-HTML-TreeBuilder-LibXML'...
$ git fetch origin e85ccad69605631282fc7f8f531963135cc264a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTML-TreeBuilder-LibXML
 * [new ref]         e85ccad69605631282fc7f8f531963135cc264a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e85ccad Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild