$ git clone -n https://src.fedoraproject.org/rpms/perl-Dir-Self.git /var/lib/mock/f45-build-23193-596/root/chroot_tmpdir/scmroot/perl-Dir-Self
Cloning into '/var/lib/mock/f45-build-23193-596/root/chroot_tmpdir/scmroot/perl-Dir-Self'...
$ git fetch origin e6b899af2c3051183aace9cec5cae42fb23665b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Dir-Self
 * [new ref]         e6b899af2c3051183aace9cec5cae42fb23665b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6b899a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild