$ git clone -n https://src.fedoraproject.org/rpms/perl-Meta-Builder.git /var/lib/mock/f40-build-2626764-65301/root/chroot_tmpdir/scmroot/perl-Meta-Builder
Cloning into '/var/lib/mock/f40-build-2626764-65301/root/chroot_tmpdir/scmroot/perl-Meta-Builder'...
$ git fetch origin 578d1f2481546615c99c285e6a18d4c69c3372a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Meta-Builder
 * [new ref]         578d1f2481546615c99c285e6a18d4c69c3372a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 578d1f2 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild