$ git clone -n https://src.fedoraproject.org/rpms/perl-ExtUtils-CBuilder.git /var/lib/mock/f40-build-2623849-65016/root/chroot_tmpdir/scmroot/perl-ExtUtils-CBuilder
Cloning into '/var/lib/mock/f40-build-2623849-65016/root/chroot_tmpdir/scmroot/perl-ExtUtils-CBuilder'...
$ git fetch origin 5e6588b0a0c2e24700ee39c9744efaa03603906b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-ExtUtils-CBuilder
 * [new ref]         5e6588b0a0c2e24700ee39c9744efaa03603906b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e6588b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild