$ git clone -n https://src.fedoraproject.org/rpms/R-rematch2.git /var/lib/mock/f38-build-side-42-init-devel-805407-28190/root/chroot_tmpdir/scmroot/R-rematch2
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-805407-28190/root/chroot_tmpdir/scmroot/R-rematch2'...
$ git fetch origin ac4dc5ae02d0c84b899c456febff79be020c0c0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rematch2
 * [new ref]         ac4dc5ae02d0c84b899c456febff79be020c0c0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac4dc5a Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild