$ git clone -n https://src.fedoraproject.org/rpms/perl-Class-Container.git /var/lib/mock/f45-build-22321-590/root/chroot_tmpdir/scmroot/perl-Class-Container
Cloning into '/var/lib/mock/f45-build-22321-590/root/chroot_tmpdir/scmroot/perl-Class-Container'...
$ git fetch origin 5bb90294cdc4e2180abc0b638575803115e3de20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Class-Container
 * [new ref]         5bb90294cdc4e2180abc0b638575803115e3de20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bb9029 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild