$ git clone -n https://src.fedoraproject.org/rpms/perl-Kwiki-NewPage.git /var/lib/mock/f45-build-24388-603/root/chroot_tmpdir/scmroot/perl-Kwiki-NewPage
Cloning into '/var/lib/mock/f45-build-24388-603/root/chroot_tmpdir/scmroot/perl-Kwiki-NewPage'...
$ git fetch origin 891ca60e8cb48e069db971e5bcca2ddd871bb30a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Kwiki-NewPage
 * [new ref]         891ca60e8cb48e069db971e5bcca2ddd871bb30a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 891ca60 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild