$ git clone -n https://src.fedoraproject.org/rpms/perl-Image-Math-Constrain.git /var/lib/mock/f40-build-2018071-46376/root/chroot_tmpdir/scmroot/perl-Image-Math-Constrain
Cloning into '/var/lib/mock/f40-build-2018071-46376/root/chroot_tmpdir/scmroot/perl-Image-Math-Constrain'...
$ git fetch origin 915ca75ec9b7372dc29e4784aa3d34d3f5d8ebae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Image-Math-Constrain
 * [new ref]         915ca75ec9b7372dc29e4784aa3d34d3f5d8ebae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 915ca75 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild