$ git clone -n https://src.fedoraproject.org/rpms/perl-Directory-Scratch-Structured.git /var/lib/mock/f45-build-23196-596/root/chroot_tmpdir/scmroot/perl-Directory-Scratch-Structured
Cloning into '/var/lib/mock/f45-build-23196-596/root/chroot_tmpdir/scmroot/perl-Directory-Scratch-Structured'...
$ git fetch origin f1c71aaf927fa29b4b43cc8d747025edabfe0bf1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Directory-Scratch-Structured
 * [new ref]         f1c71aaf927fa29b4b43cc8d747025edabfe0bf1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1c71aa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild