$ git clone -n https://src.fedoraproject.org/rpms/t-digest.git /var/lib/mock/f38-build-side-42-init-devel-717015-27296/root/chroot_tmpdir/scmroot/t-digest
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-717015-27296/root/chroot_tmpdir/scmroot/t-digest'...
$ git fetch origin 3cd33f7ccb261350d29309db9d3fc048f9839f35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/t-digest
 * [new ref]         3cd33f7ccb261350d29309db9d3fc048f9839f35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cd33f7 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild