$ git clone -n https://src.fedoraproject.org/rpms/perl-Kwiki-UserName.git /var/lib/mock/f45-build-24332-603/root/chroot_tmpdir/scmroot/perl-Kwiki-UserName
Cloning into '/var/lib/mock/f45-build-24332-603/root/chroot_tmpdir/scmroot/perl-Kwiki-UserName'...
$ git fetch origin d1cb716ddff6c440d6724697f3506487f3c9f78d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Kwiki-UserName
 * [new ref]         d1cb716ddff6c440d6724697f3506487f3c9f78d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1cb716 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild