$ git clone -n https://src.fedoraproject.org/rpms/freeze.git /var/lib/mock/f45-build-9270-400/root/chroot_tmpdir/scmroot/freeze
Cloning into '/var/lib/mock/f45-build-9270-400/root/chroot_tmpdir/scmroot/freeze'...
$ git fetch origin 36c8319fdd22cdb366c5ed11f298d14560c94e3c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freeze
 * [new ref]         36c8319fdd22cdb366c5ed11f298d14560c94e3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36c8319 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild