$ git clone -n https://src.fedoraproject.org/rpms/perl-IO-Handle-Util.git /var/lib/mock/f45-build-24161-602/root/chroot_tmpdir/scmroot/perl-IO-Handle-Util
Cloning into '/var/lib/mock/f45-build-24161-602/root/chroot_tmpdir/scmroot/perl-IO-Handle-Util'...
$ git fetch origin 470be68bc1fa0c00c3d65a61b9fef63ba35d964c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IO-Handle-Util
 * [new ref]         470be68bc1fa0c00c3d65a61b9fef63ba35d964c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 470be68 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild