$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-json.git /var/lib/mock/f38-build-side-42-init-devel-756379-27676/root/chroot_tmpdir/scmroot/gap-pkg-json
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-756379-27676/root/chroot_tmpdir/scmroot/gap-pkg-json'...
$ git fetch origin 6b718dc316905baf1949dc87809a5774314f5923:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-json
 * [new ref]         6b718dc316905baf1949dc87809a5774314f5923 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b718dc Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild