$ git clone -n https://src.fedoraproject.org/rpms/perl-Switch.git /var/lib/mock/f45-build-26402-617/root/chroot_tmpdir/scmroot/perl-Switch
Cloning into '/var/lib/mock/f45-build-26402-617/root/chroot_tmpdir/scmroot/perl-Switch'...
$ git fetch origin c3e3376aef4f7b0ff8d9a1de6ab0f9f346094d6e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Switch
 * [new ref]         c3e3376aef4f7b0ff8d9a1de6ab0f9f346094d6e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3e3376 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild