$ git clone -n https://src.fedoraproject.org/rpms/perl-HTTP-Cache-Transparent.git /var/lib/mock/f45-build-23981-601/root/chroot_tmpdir/scmroot/perl-HTTP-Cache-Transparent
Cloning into '/var/lib/mock/f45-build-23981-601/root/chroot_tmpdir/scmroot/perl-HTTP-Cache-Transparent'...
$ git fetch origin 407c3352ef1176a6b85a6bbd6aa8bb649f3478d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTTP-Cache-Transparent
 * [new ref]         407c3352ef1176a6b85a6bbd6aa8bb649f3478d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 407c335 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild