$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-TreeBuilder.git /var/lib/mock/f45-build-27589-625/root/chroot_tmpdir/scmroot/perl-XML-TreeBuilder
Cloning into '/var/lib/mock/f45-build-27589-625/root/chroot_tmpdir/scmroot/perl-XML-TreeBuilder'...
$ git fetch origin 59fe476d38bb7e6b605fb49db41b8be6f29c2ccb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-TreeBuilder
 * [new ref]         59fe476d38bb7e6b605fb49db41b8be6f29c2ccb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59fe476 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild