$ git clone -n https://src.fedoraproject.org/rpms/html401-dtds.git /var/lib/mock/f38-build-side-42-init-devel-706379-27165/root/chroot_tmpdir/scmroot/html401-dtds
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-706379-27165/root/chroot_tmpdir/scmroot/html401-dtds'...
$ git fetch origin b7cfe1a71b2d037c7d389c7d1cc6e50e10544fe3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/html401-dtds
 * [new ref]         b7cfe1a71b2d037c7d389c7d1cc6e50e10544fe3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b7cfe1a Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild