$ git clone -n https://src.fedoraproject.org/rpms/wasi-libc.git /var/lib/mock/f38-build-side-42-init-devel-1178530-30617/root/chroot_tmpdir/scmroot/wasi-libc
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1178530-30617/root/chroot_tmpdir/scmroot/wasi-libc'...
$ git fetch origin ac6e1eb208363a99d567ef4a43bd2d2338ae0c0a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wasi-libc
 * [new ref]         ac6e1eb208363a99d567ef4a43bd2d2338ae0c0a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac6e1eb Do not repackage the library archive (rhbz#2228297)