$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-Libm.git /var/lib/mock/f40-build-779660-130430/root/chroot_tmpdir/scmroot/perl-Math-Libm
Cloning into '/var/lib/mock/f40-build-779660-130430/root/chroot_tmpdir/scmroot/perl-Math-Libm'...
$ git fetch origin 3c7b3cd76b1624eb2cf6fc424043f3c726198b9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Math-Libm
 * [new ref]         3c7b3cd76b1624eb2cf6fc424043f3c726198b9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c7b3cd Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild