$ git clone -n https://src.fedoraproject.org/rpms/perl-Module-Package-Au.git /var/lib/mock/f45-build-24904-607/root/chroot_tmpdir/scmroot/perl-Module-Package-Au
Cloning into '/var/lib/mock/f45-build-24904-607/root/chroot_tmpdir/scmroot/perl-Module-Package-Au'...
$ git fetch origin 6f006e592de6fa5fc39a0b5c966e1b312ea9bc7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Module-Package-Au
 * [new ref]         6f006e592de6fa5fc39a0b5c966e1b312ea9bc7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f006e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild