$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI-Application-Server.git /var/lib/mock/f45-build-22042-589/root/chroot_tmpdir/scmroot/perl-CGI-Application-Server
Cloning into '/var/lib/mock/f45-build-22042-589/root/chroot_tmpdir/scmroot/perl-CGI-Application-Server'...
$ git fetch origin b4ec97ad27916f8ed76526522695042fea0f3616:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI-Application-Server
 * [new ref]         b4ec97ad27916f8ed76526522695042fea0f3616 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4ec97a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild