$ git clone -n https://src.fedoraproject.org/rpms/perl-Daemon-Generic.git /var/lib/mock/f45-build-22846-594/root/chroot_tmpdir/scmroot/perl-Daemon-Generic
Cloning into '/var/lib/mock/f45-build-22846-594/root/chroot_tmpdir/scmroot/perl-Daemon-Generic'...
$ git fetch origin 4e90521c52525d718a1a2fc7fda36eb8ddfe8da4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Daemon-Generic
 * [new ref]         4e90521c52525d718a1a2fc7fda36eb8ddfe8da4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e90521 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild