$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-CBC.git /var/lib/mock/f45-build-22550-593/root/chroot_tmpdir/scmroot/perl-Crypt-CBC
Cloning into '/var/lib/mock/f45-build-22550-593/root/chroot_tmpdir/scmroot/perl-Crypt-CBC'...
$ git fetch origin ce0b6d399a46851109b460457060aba62e4f63d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-CBC
 * [new ref]         ce0b6d399a46851109b460457060aba62e4f63d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce0b6d3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild