$ git clone -n https://src.fedoraproject.org/rpms/perl-Class-Trigger.git /var/lib/mock/f45-build-22372-591/root/chroot_tmpdir/scmroot/perl-Class-Trigger
Cloning into '/var/lib/mock/f45-build-22372-591/root/chroot_tmpdir/scmroot/perl-Class-Trigger'...
$ git fetch origin 8c84b460b986cd90f3b84e51ce83a8e9af75d55f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Class-Trigger
 * [new ref]         8c84b460b986cd90f3b84e51ce83a8e9af75d55f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c84b46 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild