$ git clone -n https://src.fedoraproject.org/rpms/clang10.git /var/lib/mock/f38-build-side-42-init-devel-836506-28395/root/chroot_tmpdir/scmroot/clang10
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-836506-28395/root/chroot_tmpdir/scmroot/clang10'...
$ git fetch origin 8057d276eb8db93cad507c6526c9bb015c5e293e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clang10
 * [new ref]         8057d276eb8db93cad507c6526c9bb015c5e293e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8057d27 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild