$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-Base-Convert.git /var/lib/mock/f40-build-2626576-65285/root/chroot_tmpdir/scmroot/perl-Math-Base-Convert
Cloning into '/var/lib/mock/f40-build-2626576-65285/root/chroot_tmpdir/scmroot/perl-Math-Base-Convert'...
$ git fetch origin 10bbd71f5951c33ec9d9873471a1c5ddf4a0a9c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Math-Base-Convert
 * [new ref]         10bbd71f5951c33ec9d9873471a1c5ddf4a0a9c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10bbd71 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild