$ git clone -n https://src.fedoraproject.org/rpms/perl-DateTime-Set.git /var/lib/mock/f45-build-22934-595/root/chroot_tmpdir/scmroot/perl-DateTime-Set
Cloning into '/var/lib/mock/f45-build-22934-595/root/chroot_tmpdir/scmroot/perl-DateTime-Set'...
$ git fetch origin e6fbbcb3fb592026341a985db1173693b2fe3182:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DateTime-Set
 * [new ref]         e6fbbcb3fb592026341a985db1173693b2fe3182 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6fbbcb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild