$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Compare.git /var/lib/mock/f45-build-22847-594/root/chroot_tmpdir/scmroot/perl-Data-Compare
Cloning into '/var/lib/mock/f45-build-22847-594/root/chroot_tmpdir/scmroot/perl-Data-Compare'...
$ git fetch origin e4a97ef281147e73cb7309e552a55a79796a3a0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Compare
 * [new ref]         e4a97ef281147e73cb7309e552a55a79796a3a0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4a97ef Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild