$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI-Prototype.git /var/lib/mock/f45-build-21972-589/root/chroot_tmpdir/scmroot/perl-CGI-Prototype
Cloning into '/var/lib/mock/f45-build-21972-589/root/chroot_tmpdir/scmroot/perl-CGI-Prototype'...
$ git fetch origin 74ea2dce058e5c29a4ae1d939274f68fdc211df6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI-Prototype
 * [new ref]         74ea2dce058e5c29a4ae1d939274f68fdc211df6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74ea2dc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild