$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Stream-Bulk.git /var/lib/mock/f45-build-22952-595/root/chroot_tmpdir/scmroot/perl-Data-Stream-Bulk
Cloning into '/var/lib/mock/f45-build-22952-595/root/chroot_tmpdir/scmroot/perl-Data-Stream-Bulk'...
$ git fetch origin d7faadcccb5800e2f3261a2a770280e21223e4c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Stream-Bulk
 * [new ref]         d7faadcccb5800e2f3261a2a770280e21223e4c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7faadc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild