$ git clone -n https://src.fedoraproject.org/rpms/perl-Panotools-Script.git /var/lib/mock/f45-build-25615-612/root/chroot_tmpdir/scmroot/perl-Panotools-Script
Cloning into '/var/lib/mock/f45-build-25615-612/root/chroot_tmpdir/scmroot/perl-Panotools-Script'...
$ git fetch origin 50a9108847122a64b15588caf6ccf21435df80df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Panotools-Script
 * [new ref]         50a9108847122a64b15588caf6ccf21435df80df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 50a9108 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild